I have had vertigo for 3 years. i just started doxycycline for infection. vertigo and headaches have been much worse. could it be the doxycycline?

Infection related?: Is your infection for which you're on doxy supposedly the cause of your 3 years of vertigo? If so then, I must suggest the presumptive diagnosis is in error & predict antibiotics will do nothing except potentially make you sick or break out in a rash. There is a type of headache called MIGRAINOUS VERTIGO (Headache + Vertigo). Need to see neurologist (headache specialist would be good) for DX & Tx.