What should I do?

I have been talking to this girl I have met in college for about 2 weeks now. We hit it off immediately when we first met, and we plan to have a dating relationship. She constantly brings up 3 specific football teammates of mine when talking, and are with them often. Although we aren't dating she asked if I was jealous. I said, but I am for some reason. Never have I been the jealous type, but she assures me that I have nothing to worry about. She has been hurt by guys which makes me trust her, but I still feel weird about something. In the past 2 days she said that she'll call about me and her getting together to do something, but she hasn't. Something in my head tells me that it has something to do with those 3. She says she really likes me, and I don't want to damage anything that is building between us by saying something that I feel uneasy about. I am not trying to interrogate in any way shape or form, I just wanna get a feel on things, ya know. Should I say something to her about how I feel? Or should I just leave it be and trust her, and see how things play out? General advice and feedback is welcomed. I am not usually like, and I am really not a bad and jealous person. Thank you :)