Dude dude dude, I don't understand this ideology people have that steroids are some type of magic cure-all. "I've injured myself and I don't know how or what, so I was thinking of using steroids to see if they help". Just, no. Wrong attitude. It makes so little fucking sense.
What it sounds like to me is you've unknowingly involved your pelvic muscles while doing an ab exercise (which does happen) and you've torn the shit out of something in that region (which does happen) and you've lost all muscle tone in that area (which does happen).
And that entire region is and needs to be constantly flexed and in great tone to some degree to:
A: keep your stomach and bowels where it should be
B: keep your piss and shit where it should be and
C: held hold your spine up
You may have heard people always talk about isolating your pelvic muscles and being sure to NEVER engage them in ab work let alone such a strong ab exercise. They can't take that kind of punishment. Moreover leg raises period - even for abs - are a pretty advanced exercise. I can understand the exact type of strain you would have been doing here. Just like a post-birth woman who has busted her pelvic floor from child birth, you're now also experiencing incontinence because you have no way of keeping all that stuff in. As mentioned, it has to be in good order because it is CONSTANTLY flexed to keep your from pissing and crapping yourself. Graphic, but true AF.
You need to go see a post-natal physiotherapist / pelvic floor expert / women's incontinence expert.