I had unprotected sex 3 weeks ago, he pulled out, but now my period is 3 days late, I've been getting some cramping, sore breasts, colulstrum in my nipples and clear discharge. Could I be pregnant?

Yes you could, but you need to take an HPT to find out for sure.

Why are you confused ?

Pull out does not work, it is a common fact, easy find out about on internet. There is sperm in the early fluids so the man does not have to ejaculate for you to get pregnant.

So lets start over, you had unprotected sex , thus it is more likely you are pregnant.

You are only 3 days late, so you should not really even have other pregnancy signs yet, that is more likely stress or worry causing them.

You have to wait 11 more days, and if still no period, do a pregnancy test with first urine of the morning as soon as you wake up