Feeling down

So last weekend I went out with a friend and her baby... And I’ve kind of been in a huge funk since this. Holding her baby seemed just annoying to me, and I’ve felt very disconnected to mine lately. Just keep thinking about how bad it’s going to be to have my whole life change and feeling like I’m not going to be able to love him... Its insane. I just keep crying. Is anyone else going through anything like this?