jealous and upset

Is it wrong that I'm jealous of all of my friends because they have had absolutely no problems conceiving and yet here I am two plus years later and still no baby. Seriously in the last week I've gotten a text from four different friends telling me the good news of them being pregnant. The most of my friends already have kids. It's like all the girls I went to school with are having or have already had kids :(. I just want it to be my turn already. I'm 100% jealous and almost feel like it will never happen. And I know that it will happen when the time is right but after so long it starts to feel like the time is never going to be right for us. I don't know what to do or how to get our chances of fertility up. Any advice or tips that have helped would be greatly appreciated.