Am I crazy??

So i was snooping around my husbands phone and on the call log i saw that he had a facetime call to one of his co workers. It's a female and i never really liked their friendship and made it clear to him when i was pregnant that i did not want him talking to her. Iam now 4 weeks pp and this happens....I finally had the courage to ask him why he had called her to facetime and why not just do a normal call and his answer was "i just wanted to facetime her". Uhg im so angry at him and it bugs me so much! Am i crazy for thinking that this "friendship" might be more than just that? Could it be just the hormones?? I love being a mom!! But Im exhausted! And the fact that i have to deal with this on top of everything else is stressing me out 😭😭