Hang in there! It's absolutely worth all the effort, and things will likely turn out far better than you may think.

I strongly encourage you to talk to a therapist or counselor of some sort - even after just a few chats they can arm you with some really great tools.

For managing the anxiety of life generally and parenting specifically, religion has been very helpful for me. If you're not into that, maybe find something that strengthens the big picture & long term view of things.