Agree about trying really hard to accept that blips happen, and trying not to panic that it won't ever go away. I am the Panic Queen each time a blip hits, convinced I will stay like it forever. I just can't seem to reason my way out of it.
Since finally getting into the right HRT and dose 3.5 years ago, I bet I've struggled through 12-14 blips, each lasting between 1 - 3 weeks. Some were really severe, though never quite as bad as before HRT.
My blips happen almost instantaneously. This latest time I was relaxing on the sofa feeling great. Then I reached over to my cup of coffee, and in the time it took to pick it up and bring it to my lips the nasty anxiety/dread hit! Really that fast. I've never come across anyone else who gets it like that?
What I find really, really helps is to keep a log of these blips, and a detailed list of symptoms and (most importantly) when they started and When. They. Stopped. So far, mine have always stopped.