Pregnancy

Me and my boyfriend have been trying to have a kid. The last time we tried we did it on my fertility window around 2 times a day or whenever we got the chance. I get my period regularly but for some reason i cant seem to get pregnant. Even before him I had sex for a whole year without any protection. The guy never came inside tho. I still wasn't able to get pregnant. Am I able to have kids? How would I find out if im even fertile?