My Boyfriend And I Had A Foreplay And I Noticed

my boyfriend and I had a foreplay and I noticed I was spotting the next day (light pink) and have been spotting for about 3 days now..my period is in about 2 days.. now I am reading so many things online and scared... I am confused as I don't know if the cause of my spotting is because I was hurt during the foreplay or some sperm was accidentally released into me.. I am now wondering if I should go take a pregnancy test of wait to see if my period comes as scheduled.. btw (we were clothed when he ejaculated)