Have you researched "emotional blunting"? It sounds a lot like it, but I'm not sure why. SSRIs are notorious for causing it, but it doesn't look like you're taking any. Unless there's one I don't recognize. Perhaps it's one of your other meds causing it?

I think the best thing to do is to see your pdoc and try to find out what's going on. It may be something as simple as changing a med or dosage.

I think all of us get depressed and lose our emotions as we cycle, but I don't think it's normal for you to be in a constant state like that. I hope you find out soon what's going on.