WTF Happened to Me?

Its been a good few days. I haven't had any hysterical crying fits in three days. I wake up every morning with anxiety. I practice some breathing and my cat sits on me (how does he know?). I continue to function.

This thing seems to go in cycles... fine for a weeks really bad for two or so . Just waiting for the next attack to come ...

So how do we keep going? What makes it worth it ? I feel like a burden to my husband and parents. I would be there for them in a similar situation, but I wouldn't want to dealt with me. 

I have a good life and I know it. I have a wonderful husband ... great parents... a great job. Why isn't that enough ? Why can't I just be happy?