Because it seems that everyone is getting pregnant except for me

. Two of my closest friends are newly pregnant and everyone on here is getting pregnant and everywhere I look I see pregnant ladies. Don't get me wrong I am happy for everyone but I just really want to be next.
The most frustrating part is that I am really having a hard time figuring out when I'm ovulating. Before my m/c in July it was easy for me to tell when I was, but now my body and my cycles seem really different. I would normally just have sex all the time but my husband works alternating weeks of day/night shift so it isn't always possible. When it comes to temping, is there a certain kind of thermometer that I need and when is the best time to take my temp and how do I know when it's happening.....
Sorry I just really need to vent, so thanks for listening. Btw I do know that there are a lot of women on here who do feel the same way that I do and I just wanted to say that I completely understand what all of you are going through!!!!
Shannah