ok pkpeterson.....
here's some positive thoughts.
I'm the person who has had super strong nails since vaccine, along with severe spine, neck , back pain.
Well, thinking about your headaches. Before my vaccine pain I had over 30 years of migraines, acute sinusitis, and ugly cough for months every year. After I got an incomplete root canal pulled. Sinusitis and cough disappeared. And migraines gradually disappeared.
So..... all the years of migraines I always knew calcium, supplements or food would make my headaches worse and a stiff neck. So I didn't do this stuff for years. Thinking my migraines were cured, I have been eating cheese and yogurt and soy yogurts etc.....
My vaccine side effects have been horrible. So,,,, 3 days ago I quit the cheese etc, no calcium supplements for a few weeks. And my spine pain is about 60 % better. Especially my horrible neck pain. Of course I have a doctors appointment today. Since your finger nails are also stronger..... thinking something might be upping the calcium in my body (nails)....
I'm not a doctor..... just my life experience.... but maybe you could try cutting back on all calcium stuff for a while and see if that makes a difference with headaches, tinnitus ( which I used to get with my headaches too).... I've always changed my diet with my migraines... was no other choice and it usually worked. You can only go so long without eating..( maybe effected my infected root at the same time).....
Hopefully this might help. There is a lot on line (of course) about calcium being bad for you, clogging arteries etc. No one ever believed me when I said calcium supplements gave me a stiff neck. All doctors recommended for my bones.... Going to try to start up some light weight lifting for my bones ( after 2 years without because of spine pain)
I'm feeling great today. Hope this might work for you... at least a little.
Good luck, good luck , good luck...... I'm ready for the bad nails again if my pain gets better.