having sex for the first time

i been with my boyfrined for a while bout 3mos so one day we were out and we went back to his house we went in his room and just was sitting on the bed talking then we started to kiss and he started to take his clothes off and minds mind you that this is my 1st time having sex so i was a lil scared because i dont want to get pregnant. we had safe sex we used a condom but im not on any brith control so when he did enter me right away it hurt so bad i mean really really bad every time he would push in so we stop for a minute then start again but it still hurt but to make a long story short it came but i didnt i guess cause it was hurting so much but after held me and kiss me to let me know every thing was ok but the next day i woke up feeling so bad every minute im thinking what if your pregnant looking in the miorr to see if my stomach is getting big laying in bed all day trying to sleep all day so i couldnt think about it i mean my emotions was all over i cried for almost a week str8 till finally i got my period and i was so happy i felt like the world was lifted off my shoulders cause i know if i get my period i cant be pregnant but till this day i still wonder like can i be pregnant even if i got my period. but the thing is i dont regret having sex sex the only thing i wish i did do was be on brith control when i had sex. but i know next time i will but i said to my self if this is the way im gonna be felling after having sex then i dont wanna do it again for a long time. but i guess cause i was just scared and it was my 1st time.

but can any one give me some advice please