pls help...is this parasites ? Diarrhea for two months dr don’t know why

I’m 30 yr old female and have been having diarrhea for two months straight. Now all that comes out is liquid and these white things. I’ve been to the hospital 3x in the last month bc this is causing severe stomach cramping and I even had inflammation in my joints. The doctors are stumped and I have 3 beautiful young children that I need to be healthy for.