Diziness after COVID19 Infection.

Hello Doctor, 2 months back I had symptoms like lack of smell or taste, dry cough, dizziness, headache, body pain etc. I consulted 2 GP's who prescribed me some medicines but never told me to get a COVID test done. It was only a month back when I showed an ENT suspecting Sinusitis who asked me to get a COVID Antibody IGG and Total test done that revealed I have COVID antibodies(IGG - 6.65 & Total - 88.7). Also my Vitamin D test revealed deficiency(Value - 10.39). After these reports the doctor prescribed me Vitamin C and D tablets among other medicines. But even after having them for about a month now, the dizziness is still there ! It is close to 2 months now that this dizziness and head heaviness is there throughout the day ! I am not being able to focus on work due to this as I feel very lethargic. How long does it take for Vitamin D levels to become normal ? Kindly suggest what should I do, Thanks.