I am 20yrs old. Me and my boyfriend had sex on November 2nd. He wore a condom but said it slipped. Ok so my period was due on the 22nd but never came although I did notice 3 spots of blood on my undies on the 15th(a week before my period TMI I know

) Anyways I have taken 3 pregnancy tests 1 being at the doctor's office and they are all negative. I am having some
pregnancy symptoms but the test are negstive. IF I am pregnant I would be 8 weeks because my last period was October 22nd. What should I do? Thank you and God Bless!