you should feel none of that on 5mg of var and there is no such thing as "test flu" with var. Splitting a piece of 5mg tablet in my opinion isn't worth it. I don't know if you have been given something other than var but I would continue at 5mg for a few more days and see if you feel different. If not, it will be your call to stop. This is what I would do. Let me know how things go.