Nervous.

I'm 37 weeks and 1 day. It feels like I've been pregnant for 3 years lol I haven't had any cramps at all up until the last couple days. I'm scared I won't know when I'm actually having contractions and that it'll be too late and I won't make it to the hospital😅 I'm just freaking out. I was sitting here and maybe half an hour ago got really sharp pains that I felt were going all the way down into my lady bits😬 which I've had before but never that painful. since then I've been feeling period like pains but they don't hurt too bad. Is this Braxton hicks? or should I be worried. I just need a little advice. My doctor never told me how to time contractions but these cramps have lasted a while but each one is only a few seconds long. I'm just not sure.