hi 1.5 month back i had a romantic relation with my boyfriend on 24 march ... but there was no penetration in my vagina ... i had periods on 17 last month which was three days late ... but now i realize that i have been experiencing a one sided back pain from 24 march ... well i happened to have exercised a lot and work a lot at that time so i thought it may be sprain ... but no i am worried about an ectopic pregnancy ... well i don't have sore breast or gain in appetite, no dizziness no nausea .. only this pain ... please guide me is it chances of ectopic pregnancy