I am urinating every 15 to 20 minutes and my stomach feels very acidic. I have been feeling dizzy for four days already. Is this a sign of vertigo?

I recommend that you go see your doctor to check for urinary tract infection, which would explain the vertigo. Left untreated, this could be a very serious issue. 

If there is no trace of infection, I would suggest taking Stinging Nettle from A.Vogel. It helps reduce the amount of irritants in the urinary tract and should help calm urination. To soothe the stomach irritation you can try A.Vogel Artichoke • Milk Thistle Boldocynara® Complex.