Another vote for possible low blood pressure. I had normal values when diagnosed, and since low carbing, I have to add salt to just about everything to keep from the world going dark. My blood pressure just is a tad too low not to. Consider this: There's salt in bread, in pasta, we put it on spuds etc... All the things
you're not eating anymore. Keep in mind though, this might be a case of barking up the wrong tree entirely, this could indeed be an issue of false hypo's, in which case it should go away on its own. One way to fnd out: Can you get your hands on a blood pressure meter? Borrow one, or maybe check amazon for one. They're not too dear and no issues with test strips.

I know mine was very useful when my husband had Long Covid and his blood pressure went all wonky for a bit there. Same as with a blood glucose meter: If you take measurements, then you know.
And when you know, you might need to adjust your BP medication. If you record measurements, it'll help your doc make the adjustment.