Kinda bummed

My fiancé and I started TTC in January, he told me about a month and a half ago that one of his close friends who have been together less time than us is having a baby. Another one of his friends is having a baby and his best friend just had a baby a few months ago. My sister is younger than I and she has two babies. One of my coworkers is coming back from maternity leave and another one is pregnant. I know I shouldn't feel jealous but I can't help but think why hasn't it happened to me yet? I know God will bless us when the time is right. I'm just going to stop trying to test and keep taking prenatal vitamins just in case I get pregnant in a few months.