*sigh* :'/

So I'm 18, and just found out that my 36 year old mother is pregnant. I know it should be a happy thing to be told, but I can't help but to be upset, freaked out, and a little jealous. Jealous in the sense that Ive been wanting to try for a baby lately, but am not in the position to do so as of right now. I also feel like she's starting all over, and the baby will change our lives a lot, plus it makes me some what uncomfortable that we could both have babies at the same time. Does that make me crazy to not be happy for her?