We're headed for a mini vacay with lots of pool time in a few weeks and I don't think any of my pre-pregnancy suits are going to cut it. I'll be 25 weeks. Is a maternity swimsuit a necessity? Or did you just size up in a regular suit (one or two piece)? Any suggestions for either? We won't have regular access to a pool/beach this summer so I hate spending $$$ on a maternity suit that might not get worn a lot.