Light Headedness after Sneezing

I have noticed recently that I get really lightheaded about 10 seconds after sneezing. I have never noticed this before. I asked my doctor about it and he kind of blew it off. Is this normal? I’ve only noticed it the past few years.

I would appreciate any ideas of what may be causing it.

I do have mild hypertension which I am taking medication to control.

I have had frequent migraines too. The blood pressure medicine seems to have stopped most of them though.