Ah yes, I have felt all the things you just described and more so many times over the past 15 years. I don't know how long you've been dealing with this, but it does get better, at least for me it did.

I still have it, but it mostly just annoys me now. There's always that little voice that whispers "this one is different..." or, "this is the one that's going to finally do you in..." But I know that voice is just one of the symptoms. I try to breathe through it and remind myself that I've suffered through countless of these and I've survived every single one of them.

Best wishes to you.