Diziness after COVID19 infection.

Hello Doctor, 2 months back I had symptoms like lack of smell or taste, dry cough, headache, dizziness, body pain etc. I should 2 GP's who prescribed me 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 an antibody IGG and Total test done that revealed I have COVID antibodies(IGG - 6.65 & Total - 88.7) and also my Vitamin D test revealed deficiency(Value - 10.39). After these reports he prescribed me Vitamin C and D among other medicines but even after having it for about a month now, the dizziness is still there ! This is close to 2 months now that this dizziness and head heaviness is prevalent. I am not being able to work due to this as I feel very lethargic. How long will I have to take these medicines ? How long does it take for Vitamin D levels to become normal ? Kindly provide your suggestions, thank you.