Hi,
Antibiotics can cause diarrhea/colitis.
C diff infection is a common complication of antibiotic treatment.
Stool test may be done for confirmation.
If confirmed you may have to take medications for about 14 days.
Lol, are you scarred or scared? Gee whiz, maybe both now. First, IMO, you have no business, taking random drugs from a friend. That is just dangerous and just plain not smart.
Perhaps a trip to the ER? They have to treat you there. And then you should get a definite answer to your symptoms, scarring, and/or or being scared.