TMI !!!! Metformin for PCOS

FHW
TMI !!!!
Someone please help ! I was diagnosed with PCOS today and I was prescribed metformin (used to treat diabetes) my insulin level was sky high . But my doctor told me a side affect is loose stool and I took the first pill as soon as I got home , but NOTHING could have prepared me for what I'm going through tonight , I was laying in bed trying to go to sleep and out of nowhere I had an accident all over myself , I have been in the bathroom for 3 hours now unable to get off the toilet , it is like projectile water coming out of me and idk if this is normal or not , I'm scared I'm going to become dehydrated or that this is not normal .