Metformin question

Okay so my gyno put me on Metformin to help with my PCOS and to help regulate me and help me (hopefully) conceive down the road. I know side affects are diarrhea and vomiting. This may be TMI, but I have been having diarrhea all day and it hurts so damn bad to go now and I’m scared to, but it just won’t stop. And now I’m feeling like I could easily get sick. Any tips on how to feel better and get through this part? I feel like I’m dying😫