Wow, I am struggling with the same thing! It is really tough. I am glad to hear you are feeling more positive though!
The same issues keep recurring for me. They pass in waves like you said. Even though they will end the prospect of them continually coming back is difficult for me to accept.

I am just at a loss as to what to do. It feels out of my control (which is horrible for a control freak). No one else seems to have a solution either (doctors, therapists) which doesn't help my optimism.

It is much easier to have a positive outlook when you are feeling well rather than when you're feeling poor.
Let me know if anyone has any suggestions!