I get eye sensitivity with migraines too, I have for many years, I take prescribed triptan medication for it, it works if I take it soon enough. I wish I could say something more helpful but the only thing I’ve found helpful is a darkened room. Avoiding screens and bright lights/TV. Some people find tinted spectacles can help apparently.

It really would be very surprising if it were covid, you’re descriptions of your behaviour is not at all risky and you’re fully vaccinated x3. I do understand what you mean though, it’s hard to know if it’s covid when you get these symptoms all the time.

Having had covid I can say it wasn’t too dissimilar to migraine in parts but the taste and smell loss is the hallmark really -but of course a test would tell you for sure, even a lateral flow test might make you feel reassured. Hope you feel better soon and take care and rest up.