Absolutely, 100% consider migraines. Headaches are far from their only symptom, and headache-free migraines are a thing. Nausea is a common symptom. It's worth a try, and the medication is generally safe with few side effects. Consider talking to your neurologist or finding another that specializes in headaches.
Start with triptans (which your insurance may insist you do anyway), which are very cheap, and then try a CGRP blocker like Nurtec, which is patented and expensive. I get migraines, but nausea, depression and tiredness are far bigger effects for me than the actual headache (which is normally controllable with OTC drugs). CGRP blockers have been life-changing. It took them years to diagnose me with migraines, in fact I had to suggest it myself.
I've had headache-free ocular migraines since I was about 13 or 14. Your typical aura/flashing/light sensitivity. They always are proceeded by some flash and then I know I have maybe 15 minutes before I'm in the middle of it.
Anyway, two things that I find helps. The easiest one is supplementing magnesium -- if I ever run out and forget to order more for a couple weeks I'll inevitably have a migraine. The other one is LSD or mushrooms. My friend is a science journalist and covered a group of people taking LSD for cluster headaches, and I figured if it was working for them it was worth a shot.
I still get them a few times per year, but it's way way less frequent now.
I found my ocular migraines were triggered by my looking out the window in the morning while I brushed my teeth. On sunny days it was a lot of brightness to take in. Since I stopped doing that I haven’t had a single one.
Yes, the change of light intensity is a common trigger for me. Either looking at a screen and then outside, or vice versa, or even bright led lights. But they've still largely gone away with regular magnesium supplementation and occasional psychedelic use (a few times per year).
Start with triptans (which your insurance may insist you do anyway), which are very cheap, and then try a CGRP blocker like Nurtec, which is patented and expensive. I get migraines, but nausea, depression and tiredness are far bigger effects for me than the actual headache (which is normally controllable with OTC drugs). CGRP blockers have been life-changing. It took them years to diagnose me with migraines, in fact I had to suggest it myself.