blood results

Hi.Just had my test results

T3 4.7 (3.5-6.5)

T4 20 (9-25)

TSH 0.58 (0.3-5.5)

These are quite good aren't they??II also have vit d deficiency ( 15 ng) and on 20 000 IU vit D three times week.....Still feeling a bit dizzy..... Do you think that the lightheadedness and dizziness might be due to vit D deficiency?? How long do I need to supplement to see an improvement? has anyone had any experiences like that??

Thanks