Pseudomembranous Colitis
"I came back from Cuba with a sinus infection about two weeks ago.. my doctor prescribed an antibiotic that I normally used in the past, long story short I got a very nasty case of Diarrhea after the 4th day.  Started going to the bathroom over 7 times a day (i literally lost count).. 
Went to the walk-in clinic again and they said that it could be due to C.difficile and asked me to do a stool test..  said i should book an appointment in 10 days when the results got back..   I waited two days and broke.. went back to them and said there is no point in waiting as all i did all day was go to the bathroom. Needless to say after one metronidazole pill it did the trick. Hallelujah!  Best 15 dollars I ever spent!!  I am going to pass out candy boxes today."