I had protective sex with my boyfriend on 12th March . My last periods was on 28 February. Every time I participate in sex I take birth control pill. But this time it's been protective I didn't took the pill. My period is delayed for 7days. I don't have any signs r symptoms like breast tenderness,dizziness,abdominal cramps.i have done UPT which shows negative. Is there any chances of me getting pregnant.