Hi @Sheateallthehummusagain !
I understand and feel your pain. Body insecurities are so difficult to overcome. I've literally just been talking about similar with my best friend!
When I was in my late teens/early 20s I had a really tough time with my mental health and I attempted suicide a few times, but I also self harmed as a way of dealing with things. I have a lot of self harm scars all over my body, but mainly on one of my lower legs. The scars are pretty horrific (needed 126 stitches at the time) and I've spent 20 years hiding them away, sweating like there's no tomorrow in trousers, or next to the pool. People stare - believe it or not, lots do it openly! It's mortifying.
Anyway, 2.5 years ago we adopted my little boy who has sensory issues, and water play is one of his "things". So I HAD to start going swimming. The first few times were awful and there was lots of crying in the toilet when I got home. Until earlier this year when I suddenly thought, "fuck it". I gained confidence by going to the pool with my son and concentrating on him, rather than looking around to see the people looking at me. It's become so fucking liberating!!!
My confidence has now grown so much that I have spent the summer wearing shorts almost every day. For the first time in over 2 decades. I still notice the occasional stare, but I either ignore it or stare back, and they soon stop!
I see people of every size and shape in the pool. Fat, thin, hairy women, scars, tattoos... It's absolutely true when people tell you that no one else gives a flying fuck about the way you look. It's all in your head and it's so easy to let it build and build.
Maybe writing a list of the positives of being in the pool (e.g. making your daughter happy, keeping you cool, etc.)? Something you can return to any time you need it. And just take small steps. You don't have to lounge around the pool with your swimwear on. Maybe put a scarf around your waist, or wear a loose shirt, and then take them off literally just before you get in the water. Baby steps! Because I promise you that once you start it'll get easier and easier, and one day you'll end up thinking "why did I let that go on for so long?"
Sending lots of courage and support. You can do this! X