AM I PREGNANT?

My boyfriend and I had unprotected sex at 19 and 22 February (but he didnt finish inside me) and its been about 2 days I have veryyyy light pink discharge but the consistency is gel like(the discharge is lightly seen on panties and only on tissue paper ).But I am also on probiotics as per prescribed by doctor and could it be from the medicines? Also, I have finals coming up and could it be from stress?? Am I pregnant?? Please help me..I am highly anxious!!!!! I havent actually reached the time when I can test the pregancy.