My anxiety is most definitely worse at night; I had mild covid in December, which has caused my anxiety to worsen. My doctor told me that often times, our anxiety is worse at night because that is when most people "relax", especially when you are trying to go asleep. I've woken up many times in the middle of the night for no reason, confused and in a panic. I take 2 medications to help my symptoms and it has helped me. It's still a slow going healing process but anti anxiety medicine can be helpful.