@babciab

I’m going to suggest the possibility of an UTI which can cause lightheadedness. Many women get them without feeling any actual symptoms. I know if I get that spacy feeling for a few days, I will take a couple of cranberry d mannose vitamins for a few days and that seems to do the trick for me. I also am a healthy 83 old active woman with similar blood pressure. They say UTIs can lower blood pressure so maybe you can get to a pharmacy where you can check your own. If you do decide on the vitamins, get a reliable brand. You have nothing to lose trying. I am sure you have thought about your diet or caffeine consumption as you said your nutrition is good and also sleep habits.
Good luck….I really hate that lightheaded spacy feeling.

FL Mary