I had something similar happen 3 years ago. My headache lasted weeks. My GP referred me to a neurologist and he said he wanted an MRI STAT!....which obviously increased my anxiety all the more. I had the MRI and it was clear. Guess what? As soon as I got the results, the headache disappeared. (I wish the anxiety would have! It's now my main focus in terms of my health..... EVERYTHING is a brain tumor symptom to me!) I think when we focus on something so much, we literally make the pain/dizziness worse than they actually are. Guaranteed if you get a scan, it'll disappear. I'm not advocating for you to get a scan, I'm just hoping you realize that the more you focus on it, the "worse" it'll be.