Am I Overreacting/Paranoid?

Okay. So, I asked in some of my last questions if I should trust her, etc. But I am having a problem there. I texted her on Sunday, (She told me she got off being grounded on Friday, but she was at a party, soo...) and I just said "i probably think youre grounded, so call me when you get cell back." Which isn't really a problem, even though she's forgetful. The problem is, it's only been two days, and the waiting seems to drag on for weeks. I've had problems with girls and coping with those negative feelings I get, but I recovered from that, and now I'm just wondering, what do you think I should do to make myself not so... you know. Just feeling so down for pretty much nothing?