I too have tried this, sometimes it works, sometimes not. But it is a good thing to do occasionally anyway, gets the blood flow to the head, this is good especially for us older ones...I'm 67.
Would love to have the "doorway" apparatus, I do remember them. My husband has been going to make me a slanted board that can be raised at an angle....maybe one day he will do this.
The important thing is, you have found what works for you!! That is what is most vital with migraines...what works for one doesn't always work for another. And natural aids are really the best if possible.
You have done good!!!!!