depo problems?..

ok so im having some female problems ever since i got off the depo 5 months ago according to the doctors im not ovulating an i have cyst on my ovaries an now i havent had a period in a little over a month but for the whole month i been getting cramps they get stronger an stronger they hurt really bad but they only last for a 1mint an they come an go im not pregnant ive taken 3 pregnancy test im jus wondering has anybody had this after getting off the depo?