What are some of your side effects from getting the shot ?

The first 3 months I was spotting non-stop, my appetite dramatically increased, didn't have my period for 2 months , but when I did.... it was the first time in my life experiencing extreme cramps and I bled heavy for the first time.

My second time getting the shot the only side effect I've had is not getting my period in 2 months and tiredness!

What are some of your experiences or side effects ?