Feeling happy and a little jealous at the same time

Everyone around me has babies or is finding out their pregnant. I am blessed to have one son who is 12 years old but I can't seem to get pregnant again. I want a baby sooo bad. I never tracked my ovulating and periods and all that. Time to start. But I've been having unprotected sex for the past 12 years you'd think it happen by now. 😕☹️ I do feel happy for everyone, I just feel sad about my situation. I'm 32 years old. And I still want one more!!!!