Deposhot or pregnancy

Patient: Hello I am worried that I may be pregnant. I took the Depo shot March 22 and I had sex and the condom ripped. The next day I took the Plan B pill. I have not gotten my period since i took the shot. I have not had any pregnancy symptoms and I took 2 early pregnancy test that came out negative. I want to know if there is a possibility that I might be pregnant or if it is just due to the Depo shot?