I recently quit drinking after 27+ years of daily drinking. I quit for 4 months back in 2013 but other then that I rarely had a day without alcohol since 1989.
I also started taking antidepressants a few days after I quit drinking this time.
If I don't eat I also feel awful - and do get sweaty, panicky and light headed and just weird feeling. The medication I am on also has similar side effects but I think it is from not drinking anymore.
I missed lunch yesterday and by 5pm I was a mess. I went out at 6pm to get some food and I could hardly drive I was so weak and spaced out. Once I ate I was fine.
Good luck. The body needs time to adjust to change.