9 grams of UEI in one day after only using 6 grams of bali every other day for a few weeks is a serious leap.
Are you sure that what you have is UEI, because there is a lot of stuff sold as UEI that is no stronger from some of the extracts sold as '15x'
You can usually tell by the price if what you are buying is the UEI that is known for its potency, providing you are also buying it from a good kratom
I just find it hard to believe that anyone with such little kratom tolerance could take, or would need to take 9 grams of UEI.
Even when i was taking up to 50 grams of good quality kratom leaf a day, at the height of my use, idont think i could have managed 9 grams of UEI.
As for your tolerance, if you stop now it might go down enough over a week to get the same effects you were getting from 6 grams of bali, or it might not. You are going to have to work that out for yourself.