Ouch!

I've been getting this tight, crampy feeling a lot here lately... Especially when baby girl moves... I'm 30 weeks 4 days, btw... I don't remember all this with my youngest... But omg it hurts!!! I go to the doctor first thing in the morning... So I'm definitely bringing it up with her... Honestly; it reminds me of contractions, but they're not changing in time or intensity... And there's not any pattern, either. Just really bad pain. Almost like you get when you gotta go to the bathroom. (I'm not constipated, either...) I've been drinking TONS of water, so I'm not dehydrated... I asked a few friends and they said it's normal. Is it? I know she's been in a weird position a lot here lately; but idk if that has something to do with that... And what can I do, short of lying down all day; to help ease it?!