prolapsed anus

Unsure the sex of my new red devil. Store told me it is male but I think it’s female. Noticed it’s part looking very large today almost like it’s falling out. I’ve only had the fish for a few days. I’m getting worried. Hoping someone can give me advice as to what to do.

From 1-2 months my oscar is behaving weirdly, he eats like usual but he acts like he got swim bladder and also wiggle his tail like when fish does during breeding time and recently I have observed that it's stomach looks bloated and his anus looks like someone drilled a hole in their . I mainly...