Can i be pregnant?

Okay me and my boyfriend have been having unprotected sex since October, sometimes he finishes in me other times he doesn’t well in October and November my period was very odd it was a week late & it lasted for 4 days then December it was back to normal 5-6 days like usual it came at the beginning of the month & I wasn’t supposed to ovulate till Christmas eve & on December 22 we had unprotected sex then January 7th (my period was supposed to come on the 9th) i got a medium flow period & that lasted 3 days & on day two it was clear with red/pink spotting but after day 3 it was spotting which lasted 2 days & I don’t know if its happening bc im pregnant or stressed im supposed to be 5 weeks pregnant if i am I haven’t made a doctors appointment yet but i have noticed my boobs are getting sore & full i am getting veins on them too