I had an ACT of 6.5 which is well above the normal, 2.5 and I discovered that I have had it for years. No one told me anything about it. However, it can go up into the 100s and they don't get too interested below about 50. All my other liver and kidney tests are bang in the middle of the normal range.
I did reduce the amount of protein I ate and it did drop to 3.5. I should eat less protein anyway because I am prone to gout.
I think the first thing you should do is ask what the tests are and what your figures are.