The shots could be causing cramps due to the symptoms of ovulation. When you have tummy cramps, it tends to make one a irregular. I have been experiencing this lovely thing as well.
I've Been Taking The HCG Shots And Have Had Diarrhea For The Past 2 Days. Is This Normal?
I don't know if it's normal or not, but I've been having the same thing. Total liquid in the bathroom!