Hi Nit, good news on the work front, you are bound to be exhausted,both mental and physical that is quite normal and understandable until your body adjusts.
It will get easier and I can see it doing you the world of good, sometimes change that we are relunctant to do gives us the greatest blessings.
You are bound to miss the lunch times but you recognised that and see that you are getting better at it so yes be very proud of yourself.
I know how hard this has been for you.
Take care.