I am very confused if i had unprotected sex on the month of may and then i got my period on june 8 was i pregnant already on may or i got pregnant on june ?

IF you had a full period on June 8, the likelihood of being pregnant from May is very small/unlikely. If you had unprotected sex in June and are now pregnant and have not had a period since, then you likely got pregnant in June. Determining dates of conception can be done with a transvaginal ultrasound at around weeks 5-7. From this, your Dr can give you accurate dates.