Was I having withdrawals?

I am now in my third year of college and still drink pretty heavily but not anywhere near as much as I used to. The summer going into my first year of college I drank very heavily nearly every single night and this carried on a little bit even after school started. I noticed that the nights where i didn’t drink my anxiety was very high, I felt very nauseous and couldn’t fall asleep for hours. Was this a form of alcohol withdrawal? or just common hangxiety?