What Causes Nausea And Bloating After Discontinuing Depo Shots?

     hi . iam feeling bloated alot everyday till go too bed. then get up and feel the same. i feel nasea sometimes. but took pregnancy test and it said negitive . my periods not due for 10 days. and i have recently came off depo . i missed it on 20th april. is there chance i could be pregnant or is it side effect of periods or depo. please i need answers . help me thanks