sex & "possibly pregnant"

im very concerned because I've been dating this guy for 9 months and we are becoming serious like talking about a future together but wanna be patient.... well we had sex in the beginning of this month and he cummed on my thigh a lil bit and we were like tf cuz that doesn't normally happen (btw this is the first time we didn't use a condom) and I'm normally very cautious, but we didn't think about it much so I blew him and kept going then when he pulled out and cummed... he told me he was scarred and was like when I cummed on your leg... what if I cummed in you?! I was like I probably would have felt it but I was scarred too. im only 17 & hes 16. I was supposed to get my period today and I didn't.... im gonna try to get a pregnancy test...