From the Mayo Clinic:
What you can do in the meantime
If you tend to feel lightheaded when you stand up, take your time making changes in posture. If you have had episodes of dizziness while driving, arrange for alternate transportation while you're waiting to see your doctor.
If your dizziness causes you to feel like you might fall, take steps to reduce your risk. Keep your home well lit and free of hazards that might cause you to trip. Avoid area rugs and exposed electrical cords. Place furniture where you're unlikely to bump into it, and use nonslip mats in the bathtub and on shower floors.
I hope you feel better, stay strong, and keep fighting!