Summer blues

My son is 11 weeks old. Next weekend we are leaving to spend 10 days at my SO's family's place that's on the water. Every other summer we spend almost all day every day down at the water. I'm feeling very self conscious since having my baby as I got a lot of stretch marks on my stomach and legs during the pregnancy. Part of me wants to say screw it and wear a bikini part of me wants to attempt to find a one piece (which I've never liked) and part of me just wants to wear a baggy shirt and shorts and not go in the water. I know this is dumb but I just had to get my thoughts out as my boyfriend doesn't understand why I feel the way I do. I'm so incredibly grateful and in love with my little boy but have always had body issues.