I agree with those above, to make sure they have ruled any physical illness out primarily before focusing on the mental part. I know of someone who also complained so much of having gotten dizzy, she was a perfectionist and everything had to be just so, and then she hit motherhood and could not cope with the "chaos" of it, that was why she was dizzy, out of stress.

When we have had "something" in the home there has been complaints that someone has felt as if it's spirit being "pulled" and it creates a dizziness, "Something" pulling and draining.

Perhaps you could see a medium and for this medium to see if the spirit or the low level energies that I am thinking her husband must have had inside his system or just outside of it to not be stuck on her now and in their home too, try if you want to get the home cleansed as well. And then you have to keep it up now and then. Once that path is there they like to re-visit so you gotta stop them at the door ;)

Wish you all the best :)