Concerns

I'm still counting down.  37 weeks and 2 days.  So I don't know if I'm being paranoid, or what, but my worst fear as a first time mom is; "how can you tell if you're having contractions?"  For the last few days, I might be paranoid, but I've been feeling weird, but at the same time, I'm hoping that she comes now.  Could it be that it's getting close or me being paranoid?  I've also asked my doctor along with all moms, but no help.