4 weeks ago got fingered by my boyfriend. He did touch his penis before. 2 weeks ago I had a pregnancy test that was negative. Also that day I had 3 cotosone shots in my lower back. I was suppose to start my period a week and a half ago and I am late! Is there any chance that I am pregnant? Should I worry I am only 16. Please help. Oh and also 2 weeks ago my grandpa passed away and school just started so a lot of stress.