I hate myself and the way I consume things😩 help😩😩😩

I'll put it short and sweet so hopefully I get more answers..I can't stop freaking out😩
What are the chances of becoming pregnant from anal sex with a condom used?? I am terrified of the thought of pre-ejaculate maybe on the outside of the condom or on his fingers when he was fingering me. 
HAS ANYONE EVER GOTTEN PREGNANT FROM JUST 100% PRECUM AND NOT EVEN HAVING VAGINAL SEX. 

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