if we use condoms and the pull out method, will i most likely not get pregnant?

so me& my boyfriend, unprotected sex, but then it wasnt really sex at all. he basically cummed a few minuets prior (12 mins at most) and then put his (you know) back in his pants and then i told it was ok to barely insert it& it was dry after 12 mins. and he didnt go all the way in. and he didnt really go in right. he and i were still wearing clothes but he had his zipper down& was wearing shorts. anyway is it possible any of the sperm was still on his (you know)? he basically put the tip of it inside me. felt like crying afterwords and idk i have bad anxiety and yeah. anyway. am i possibly pregnant? and is this a good method? my boyfriend does have condoms, just not at my house. basically if we use condoms and the pull out method, will i most likely not get pregnant? and are trojan brand condoms good? he has stretched out these condoms when he first bought them, he said he could fit his whole arm in it and when he tried putting his leg threw it broke. it broke when it got to his thighs, he is about 5"9".