I think it really depends if you feel comfortable showing off your belly... I am almost 21 weeks and I went to walmart to get a cheap bathing suit because just like you I plan on living by the pool...
I dont know if this is happening to you but my boobs are growing so fast and what I did was get about a size or two bigger on my top because I know they are going to grow into it. I thought I got the right size for my bottoms but come to find out my ass is growing just as much as my boobs. The best thing about two pieces is that you can adjust the swim suit with your belly...That is of course if you get a string. I dont know if this will help but I hope it does.
I ordered a plain black full piece suit that looks pretty average and will stretch to fit the pregnancy. This is for our vacation. I also bought a maternity suit from Target. It is a tankini that is black and white and has just a plain bottom. I didn't buy the bottoms because I have many here and hopefully I will be able to stuff myself into them. But when we are in the pool here I don't care what I look like as long as we don't have guests.
I did wear my normal one piece for DS's swim lessons until about 20 weeks.
DS: 11/8/11 | 9 lb 7 oz, 22 inDD: 5/22/14 | 9 lb 9 oz, 21.5 in
I tried on a plus size regular bathing suit, it had an overlay suit and a liner.
Looked alright definitely comfortable. I hope to get to enjoy some time at the beach.
I bought a regular tankini; the maternity swimsuits were too big, and I'm in my sixth month!I have no idea how long it will last, but it's just a tankini top from Macys. It's super comfortable!