I Had Protected Sex, And The Guy Didn't Ejaculate, I

I had protected sex, and the guy didn't ejaculate, I took a pregnancy test about a week after and it was negative, and then a week or two later my period was suppose to come on and it was 2 days late, I took a pregnancy test on the day it finally came but it was later that night and it still said negative when it came it last 7 days but for about 3 to 4 days it was heavy. I'm very scared because I looked up you can have a heavy period and a negative pregnancy test and still be pregnant, and now my next period is about to come up in 8 days but I feel no pms, should I be worried ? Am I pregnant?