Tear Trough Filler - Munster, IN

I have an appointment on October 21st to have my tear troughs filled with restylane. I have hollows directly under the eye and also diagonal lines extending to the cheeks. I am 24 years old and believe this is a hereditary issue. My only concern is that I drink quite a bit of water (2-3 litres daily) which does a lot to temporarily rejuvenate my skin and mask my imperfections. I am concerned that the doctor will not be able to access the severity of the issue and I will be under filled. To prevent this i plan to cut back on my water consumption in the days leading up to the injections. I am hoping I can be corrected with under one cc of restylane in which case I'd like to use the extra for fine lines and depressed corners of the mouth but we will see what, if any is left over. I will update and post pictures as I get closer to the procedure.