hey, could you please help me,

i had sex on day 30th of my last cycle and then I got my period with very bad cramps, clots and clumps but the bleeding was comparatively light but way more than spotting and bled for 4 days plus some after brown discharge. but just to be sure i took a test on day 10th after having sex and it came out negative, then around the predicted date of my ovulation i started having some unusual stretchy and white (sorry tmi) and it stayed for more than 10 days, i did another test on day 20th after having sex and it came negative again, then i got symptoms like yeast infection some unusual discharge (plus some breast pain may be pms and cold) but just to be sure i took another test on day 29th after having sex and it came out negative. my periods are due in 7 days and i don't want to be pregnant. could i be pregnant