not yet boyfriend pregnancy scared

So I've talking to this guy for about 3 months now and I've be celibate for a year prior to him we had and the condom pop he didn't realize until we were done as he got up n cleaned nothing dripped out of me this happen before n I use the toilet and the semen came out I've used plan b before but this time I couldn't around to get one in time with my busy schedule and everything and totally forgot . I don't think I'm pregnant n we've talk about pregnancy n we both don't want kids right now and he isn't my boyfriend yet . Any advice for me ? Like good constructive criticism (dont judge me plz) :(