Pregnant from rubbing?

On the last day of my period, my bf and I made out and he rubbed himself against my genital. Just before he was going to ejaculate, he pulled back a little so from what I felt, the semen did not touch my vagina (I felt it under my thigh but not my butt) I have 36 days cycle and currently I'm 4 days late. I do NOT have pregnancy symptoms (nausea, fatigue, tender breasts, reaction to certain smells, frequent urine..); I have only experienced PMS symptoms (acne, water bloating - same as I usually do when my period is near). I do feel chills but I've heard that it can be either pregnancy or menstrual symptoms. I had ovulation signs as I do every cycle - white, thick digcharge - only a few days late this time. Now I'm having dry days and my period has not come! Do you think there's any chance I'm pregnant? Or does my period just happen to be late this cycle? (I'm thinking because of late ovulation and stress). I know it was immature and irresponsible not to use protection, and I will not be so careless next time; I hope somebody can give me an answer, I'm worried sick. Thanks.