re: Underwear issues...

i've known women who wore thongs while they were pregnant, so, i don't think it matters. I haven't been told anything yet, but I'm not too far yet either.

Definitely go with what's most comfy.
Stick with cotton.

I wear my regular bikinis, but in a larger size.
My butt thinks it's pregnant too.  

Quoting Rdrobins:“ Ok so someone told me today that I should be wearing underwear that goes over my bump. I'm assuming for ... [snip!] ... i've heard of it being something I "need". Also, don't they make some kinds of waist band or something that is for support?”

Yup! I agree with the rest of them. I just had the same dilemma recently that I went to a dept. store here, when the sales lady showed me what a maternity undies look like, I scrapped the idea and just satisfy myself with a lace gartered bikini which I find way comfy...