I got depo on july 16, my boyfriend and i had unprotected sex the weekend of the 19th of September. I have now been nauseated for 5 days with Some throwing up, i also have some crapping with bad lower back pain. I experienced all this my last pregnancy which was comfirmed a week and a half after my boyfriend and i had unprotected sex.. But this time im on depo and he only came in me a tiny bit.. Help???