You're not alone!
I'm a 51-year-old female, and I had my first migraine about 10 days ago (without aura). It was a doozy! It lasted four days.
The migraine ended a week ago, and I've had a constant headache ever since. It feels like a sinus headache with pressure in my right temple and cheekbone. (I occassional have sharp pains on the top and left side of my head too.) When I bend forward, my head hurts worse just like a sinus headache....but I don't have any congestion.
I have a poor appetite, brain fog, occassional light headedness, and a little sensitivity to light. My neck muscles are also stiff. I haven't experienced the rapid heart beats though.
My doctor sent me in for an MRI and everything looked fine. I'm hoping now, that these are just temporary residual effects of my migraine. Based on things I've read on this website, I'm going to take some vitamin supplements (particularly the Iron) to see if that helps. And I plan to get some massage therapy.
Did you ever find relief?