First Baby - Contraction Question

alisds

So this is my first, I've never felt a contraction before.  I'm 37 weeks and I don't think I've really had Braxton Hicks either.  I mean, I've heard two stories on what they feel like, 1) period cramps and 2) your belly tenses up for a bit.  I think I've felt the tensing up for a bit one (with no pain).  

Anyways, yesterday my dr. asked me if I have had any contractions yet and I was like "Ugh, no?"  I have no idea, which I guess means I'm just as well to say no since I will know when the real thing comes along right?

Then, this afternoon I did feel a little discomfort in my belly... it's hard to explain. Almost like a lower subtle pain.  And then I felt some pressure in my butt.  And then pressure in my vagina, kind of like I was getting kicked down there, from the inside.  Were those contactions?!

I sound so confused, whatever tips I can get will help I'm sure!