Are Fatigue Sickness & Weight Gain Common Post Depo Shot?

I am on my second shot of depo. I had no side effects after my first shot. My period stopped within a month with no spotting. Then shortly after my second shot, I started gaining weight consistently, I had spotting randomly at a month in, I have been experiencing fatigue and morning sicknes. I m not sure if I should worry about this or if this is just something common with people on depo.