Does Slightly Low Blood Sugar Level Cause Impaired Balance?

It s been almost six months i m having this problem. Long story short. Im a computer guy used to work long hours.I have been working abroad almost 1 and half years now. I used to take medicines for depression as well. It has been almost six months now i m feeling off balance and drowsy. It s like when I m standing and looking at someone talking to me(with eye contact) i feel off balance and i can t look down from high buildings and some time i m getting this feeling when i m walking. I m underweight as well.Recently i went to see the doctor and checked my heart he said it s all good. And I did blood reports liver function test all were fine apart from random blood sugar test which was slightly low.