I know I have c. Diff but can’t get tested or treated.

I have an atypical case. Due to taking a lot of florastor I think it’s masking the diarrhea. They refuse to test unless it’s diarrhea. I have severe nausea, fatigue and colitis. My entire lower stomach burns like hell. I had watery diarrhea two days ago but now not anymore…

Do I go to the ER? What if I can’t make a stool here and it’s too solid? My GP doesn’t care to help.