Do you feel tired when taking the drug Wegovy Is it normal?

I only started taking vegans, but I noticed that when I walk, go to the gym, I'm very sleepy, I have insulin resistance, I'm starting to change my eating habits. I eat more products, including protein, vegetables, meat, I changed white bread to dark bread. He drinks more water and green tea. Is this drowsiness normal when I want to sleep a lot after exercise? I've never had such a way to have it after a walk or after any other effort.