Weird bleach/ammonia smelling stool?

Hello.

I am not having diarrhea right now. I haven't had much diarrhea since February when I was on several antibiotics. However, I've had several stools since the end of March that smelled so strange. They did not smell even remotely like stool.

I know this is SO GROSS, but the stools have smelled like bleach/ammonia. It almost makes my eyes water from the smell. It smells very chemically. And I am not eating or drinking anything new/different. The stools are soft and formed. They are dark brown mostly. No mucus or blood or anything else weird. I am not extra gassy. I feel totally normal. Just having toxic smelling stools like nothing I have ever smelled before.

Thoughts? Anyone else have this before?

Sorry.... I know this is so disgusting.