i have ben having a regular 6 to 7 day period from january until april but in the month of april i had unprotected sex twice the 18th and the 19th. my period came on on the 22nd through the 28th in the month of may i had unprotected sex on the 7th, 8th, 9th, and the 12th. around the 21st i started experiencing normal back pain when my period is about to come on but my period didnt come on when it was suppose to come on round the 23rd but it did not so on the 25th i took a pregnancy test and i found out that i was pregnant. is it possible that i could have gotten pregnant in the month of may. because i didnt start feeling symptoms until shortly after i found out i was pregnant