Jealousy

So I know this is going to sound mean and hateful but it really isn't.

I am pissed off at my sister and friend for being pregnant!! I hate that they are pregnant and I am not!

This really sounds bad but it just depresses me that I've been TTC for months and they both "accidently" got pregnant.

I feel so crappy that I feel this way that I can't even bring myself to be happy for either of them, I just ignore their text and calls and I just scan pass their post on Facebook.

Am I terrible for feeling this way?