So I got the Depo shot about three weeks ago on the 19 of last month. My period was due on the 27th of last month and I’m now two weeks late on it. My boyfriend and I Had oral sex about four days after I got the shot and some of his semen landed on the outside of my vagina. I tried to wipe it out using water and toilet paper. Someone told me my circle probably just reset and I was sick when my period was due and I was really stressed from work so I don't know what is happening. It could be the sickness the Depo shot and the stress or pregnancy. (Also I haven’t had any pregnancy signs)