i am 19 yrs.. my last period was on 7th may. and on 21st may my bf has fingered me i dont know weather semen or sperm was present on his hand or not while fingering. we have same thing done on 28th may . but from 31st may i have seen frst bright red discharge after that it came brownish and till today it is brownish white like discharge. can i know that if i am pregnant or not?