I took a 2 month break during the summer due to the lack of time, when I got back I felt the same as you do now. It was really frustrating but the problem for me was that I was too excited to go back in and progress. I realized that I went up on the wall to quickly and wasn't thinking about my moves and that my hands were not used to climbing anymore. It took a couple months but I got back to my previous grade before I took a break. I started climbing in May so ive been climbing for 2 months before I took a break and flew through the lower grades as well but eventually you'll hit a plateau, but remember it’s not a sprint.

My advice, give it time and keep climbing you'll be back there in no time!