Very jealous what's wrong with me 😔

I'm currently pregnant with my second baby and my partner started a new job about 5 weeks ago.

He has been in training ever since with lots and lots of people. Everyday he comes home telling me things about girls and other stuff. It upsets me and I do get jealous. He doesn't show me attention like before and I understand he is tired etc.

I don't tell him it bothers me but it really does. He had a parking fine outside someone's house which really confused me. He said it's someone he takes home from work and I just thought that person would know your not allowed to park. Why would he let my bf park there? Even though he is responsible for his own actions.

He keeps telling me things about work and then the next day it's a different story to what he says.

I get I'm pregnant and that I may be over thinking things but how can I stop?? I never doubted him before but as he started this job with my brothers friend who is a DOG when it comes to cheating etc. I just feel like it may be rubbing off on my bf or I'm completely losing the plot.