Depo And Pregnancy

I was on depo for 7years after my first child with no side effects ~except the weight gain. I went on the depo due to a disease that required me to take medication that imposed harm on the fetus~so it was extremly important i did not get pregnant. Being married we chose the depo to be the most effective. I went off when my disease was in remission and conceived baby #2 after 2 months of going off the shot. I am now back on the shot with only one injection and i have all these horrible symptoms~I went back on the shot because i had no syptoms before. Boy was i wrong this time i have aches, headaches, nausea, adn extreme dizziness. So beware of the signs!!