possesed or crazy?

i have had several experiences over the past few years that lead me to belive i might be possesed somehow.to start overall my life is a mess,everything that can go wrong does,i have the worst luck imaginable (way to much to list)everything from health problems to car troubles, both little and big things on a daily basis,even other people can't belive my bad luck.about 6 years ago i had an expeience that was crazy. i had a weird relationship with a woman who was supposedly a wiccan.she was pretty messed up and i was trying to help her and we were supposedly dating but almost never were together.i knew she lied to me all the time but i was trying to help her.anyway one day we were on the phone and we broke up..i was devastated i started to cry then a strange feeling came over me i started shaking, my head whipping back and forth.a low groan/growl from the pit of my stomachk started to rise it got louder finally my entire body stiffened, my head shot back and my mouth opened. it felt like a huge snake of smoke poured out of my mouth.then i collapsed. i immediately felt at ease,peacefull and happy.i didnt know what had just happened. i fealt the woman i was with had somthing to do with it so i immediately called her and she justy said it was a gift and that i shouldnt waste it.i fealt very at ease almost like my life was going to change for the better...but nothing got better.since then the same type of thing has happened to me several more times.but things got worse the other night.i have a new girlfriend now,a 5 month old daughter and 7 year old stepson.my life is still a mess.we were going to sleep and the baby started crying,my gf held her to get her back to sleep.i have sleep apnea so i wear a mask to sleep.i started getting some chest pains, then i fealt that feeling in my stomach and i started to breath funny..i knew what it was..i was trying to calm down ( i have done that a few times and made it go away)but this time it was like a part of me didnt want to stop it..all of a suddeni threw my mask off and my head shot back and somthing poured out of my mouth again(it lasts for like 10 seconds or so)then i kind of collapsed again.my gf asked me what happened and if i was ok.then somthing that hasnt happened before happened,i started shaking uncontrollablyalll my muscles locked up and i was screaming a low scream (kinda like in a movie when someone is electrocuted) it stopped.then started again several times.my gf started screaming and crying and said she saw what looked like somthing starting to poke out of my back.(i don't know if this was from my muscles as i was completely locked up?i dont know)but she was terrified.then i jumped up,started growling and walked rapidly around the house..i was aware but couldnt controll myself..i started searching the house for somthing/someone...started saying that it was to leave me and my fammily alone or i was going to destroy it.i kept growling like an animal..my gf was crying and begging me to say somthing to her and i couldnt...finally i struggled to say some words to reassure her and i told her i was there to protect them,not to worry.and i wopuldnt hurt them.at no time did i feal like i was a threat to them...i fealt i was there to protect them...but i fealt like a demon,extremely angry and ready to destroy somthing for putting me and my familly in danger. i was aware of what was happeningbut it was out of my controll.finally it subsided a little..my gf was crying and wanted to leave,i understood because i was freeked out too evenb though i strongly felt they werent in danger from me.she called her parents to come get her and the kids.then we heard dogs barking and i went to the door..i immediatly got the feeling back and started growling...i had this overwhelming feeling that somthing was coming and that i needed to protect them..i started grolwing and walking around in a rage..but i calmed myself down.i waited untillafter they were gone,immediatly after they drove down the road i exploded againwalking around the yard in a rage,screaming at somthing to show itself and how dare it threaten my familly.that they may have finally found me but they will wish they hadnt and not to think i am weak because i have feelings for my familly..that i am still powerfull and will destroy anyone who threatens my familly..i was like a wild animal,spitting and growling, again i was aware but it was out of my controll,the words were just pouring out and my voice wasnt mine.this isnt a joke,it really happened and i dont know what to domy gf and kids are afraid to come back untill we figure it out and i dont blame them.we need help in finding out what this is.