Girls, please tell me, the diarrhea is not stopping at all, I'm drinking…

Girls, please tell me, the diarrhea is not stopping at all, I'm drinking activated charcoal as the doctor said. It used to help a little bit before, but now it doesn't do anything at all. Is this scary? I'm already starting to worry about it. To the doctor only on the 30th. Could there be another medicine for diarrhea? Term 18 weeks Thank you