Am I pregnant or is this just pre period discharge??

I had unprotected sex about 2 weeks ago w/ my bf. He didn't cum in me and we stopped due to his parents coming home before he could. My period is due in 3 ish days and I noticed pink discharge with red in it?? I took a pregnancy test at the beginning of the week and it said negative and then I took one today (one that was 'find out 6 days sooner') and it said negative also. I haven't had any early pregnancy symptoms besides the discharge. Could it be just bc my period is due soon???