Normal?

Third pregnancy so I'm not new to the crazy symptoms that come along with being pregnant, but this pregnancy is a bit different.

I'm 18 weeks and it's happened at least 10+ times now. All of a sudden I get light headed, dizzy, nauseous and a bit disoriented. Once it happened in walmart and I had to go sit in the car for a bit before I could even drive.

The other night I got vertigo for a few hours and luckily it was already time to go to sleep so I was just able to sleep it off.

It happens out of no where (if I've eaten, not eaten, etc) and i feel so spacey I can't function correctly..

Will be asking my OB Friday as I don't feel it's an immediate problem, but has anyone else dealt with this?