I have had the depo shot before with no side effects. I came off of it because my doctor told me that the IUD would be a better choice for me in my financial situation. About four months ago I got that removed because it had started making me sick (painful, cramping, headaches, ect.). My periods regulated themselves and I started to feel a whole lot better but on the 19th of this month I got it back because I remembered how well it worked for me. Now Im having the headaches which are normal to me, sudden weakness, and pains/ tremors in my right arm. I have no idea whats wrong with me.