I agree with prettyawesome... I went through something like this and trust me it isnt really worth worrying about unless you miss your period when its due. My best advice is to not really think about it too much or you could stress yourself out which could cause your period to be late.
no. If he never ejaculated then your not. Precum can get your pregnant but is very rare and in order for you to get pregnant that way is if you two had sex. The sperm wouldn't survive that long because it has to get past his boxers,your underware and get inside you. Chances are your not pregnant.