What do I do?!!?

I bought a bikini from Old Navy, and I was so busy yesterday that i grabbed my size and left. When i tried on the bottoms, the y were too small( i got an xs, should've gotten a small), and I had a pool party the next day so I wore it and it bothered me. I want to return it, but I've used it...what should I do? Thanks.
What do I do?!!?
wash and return if nothing happened


lol
What do I do?!!?
u have to keep it know to bad i guess just buy another bottom in your size
Reply:you have to keep it since you actually wore it
Reply:You should not return it as you have already used it. That too its a inner wear. The person who will take it unknowingly might get infection.
Reply:well you have to keep it now:O


hopefully it wasnt too expensive and you can buy another bathing suit or just buy something that matches the topp part.
Reply:well they usually dont let you return it if it is worn but you can put the sticker on the crotch and bring the tags. if you dont have he sticker then buy the right size bottoms first, put the sticker in the old ones and return them. i had to do that once.