The range of bodies at a swimming pool are both large and varied, quite literally. Full on cellulite, bat wings, limbs missing, half a tan etc etc
Once you are under the water no one cares.
Remember no matter what anyone says or thinks, when you are finally dead and not part of this world no one left cares. Anyone who does - doesn't have a life. People won't look back after you are gone and discuss how bad you looked at the swimming pool.
If you really do have some disfigurement then look at it this way. Those people who have, have the absolute courage of a lion. If you put this another way - more people have less than perfect physiques, boobs, bum, legs etc than any SM site would have you believe. That is the real world. Life is not perfect, life is full on ugly bits too. If only one more person feels at home and uses the swimming pool because they think 'well I'm not as bad as that woman/man' then that is a positive. Get your arms out there, and hold your head high. Stuff the cheap seat chatter and do everything you would do anyway. Your confidence is your most beautiful asset.
Have you thought about wild swimming or swimming in the sea and putting a wet suit on?