Couple problems

I am nearing week 36 of pregnancy and I get emotional. Recently my husband got reunited with an old schoolmate and they chat all day and night using voice note. I do overhear their conversations and it's really just normal chatting. But somehow I can't help but feel uncomfortable that he's chatting from morning to midnight 2am with the girl. I know I shouldn't be petty over this, and he also explained that she's just a friend and there won't be any other relationship between them. But I just feel that his time for me has been taken away somehow because he replies so quickly to the girl, sometimes even ignoring what I am saying when we're having dinner or small talks. #advicepls #coupleissues #marriage #trust