What Causes Head Pressure With Imbalance Of Equilibrium?

I intermittently out of nowhere get some head pressure and my equilibrium is weird. i had a CT scan for it and the Doc said he didn't see anything. He told me to buy afrin OTC. Im not really sure that is working. I dont get it all the time maybe once every ten days and it lasts for a day or two. The pressure would go away but it would take the equilibrium a day or two to go away completely. I thought maybe low blood sugar but I have tried to eat things for it. Don't think that is it. I did recently broke a molar in half down to the gums but not sure if that could do it. Maybe ear infection, but I have not ear pain, im not congested except for alittle in the morning but it goes away. The doc also did a CBC, chest x-ray, and ekg, and everything was good. Anyway, Im tired of this and need help.