so i started the birth control pill on the 7th march this year, i had sex with my boyfriend on the 21st of march but during intercourse the condom came off inside me, i had been taking the pill at roughly the same time each day and hadn't skipped one, i am now in the 4th day of the inactive pills and haven't received a period or spotting, I've had minor cramping and lower back pain but just wondering if this is normal seeing as its my first month on the pill or if i may be pregnant?