Ouch, that sucks! I've dealt with similar stuff, let's see if I can find anything to help. (Actually, something similar in my teens made me stop wearing underwear. Ow.)

You probably need to treat it with *something* at this point, so a doctor's visit might be a good idea if that's possible for you. They might prescribe an anti-fungal cream or suggest a better ointment than you were trying. The baby ointment is probably a good idea, but if you're still irritating the area all the time (by, you know, *walking*), it might not be enough to help it clear up. I'm sure others have more specific ideas...

If the skin just looks inflamed rather than actually open and seeping, maybe try coconut oil or some other neutral-ish oily stuff? The friction of skin rubbing against skin is probably part of the problem. The other part might be sweat - moist areas stay irritated a long time and can harbor yeasts and things. Air dry thoroughly post-shower, don't wear underwear to bed, try to let those creases air out. One thing that's worked for some people (when moisture really was the problem) is to fold a light pantyliner in half and put it in the crease to wick moisture away.

I hope something works soon!