How do you figure?
It’s really no different than if you hadn’t had a few months away. If you get a review and you know it - great! It’ll move on to the next level. If you fail it, it’ll go down a level and you’ll see it more often until you get it down.
You’ll be surprised - this won’t be as daunting as it seems. Pick a day you want to be back down to 0 reviews. Let’s say mid-month, so the 15th. That’s 10 days from now, so focus on getting your review count down 125 every day.
At the end of today, aim for 1125. That’s not so bad, right?
Tomorrow, aim for 1000.
Day after that, 875.
Day after that, 750.
You’ll be down to 0 and back on your feet in no time.
I always advise against resetting. IMO it needlessly throws away progress on content that you do know, and will be more overall effort and time taken in the end.