I feel stupid.

I just found my boyfriend's ex-girlfriend at his place.  I'm sorry 10 weeks 4 days and now he's saying it's not even his baby.  I am already a single parent.  My son is 13 and I've been widowed since he was 1.5 years old.  I feel like I can't do this again.  I have no one to talk to because nobody knows I'm pregnant.  I just feel stupid.