The sooner the better. You dojn't want 6to tell them what to do, but insist without being the boss, women can do this, that a check of your urine test be made to assess your GFR. The GFR simply is the higher the better. If 50-70 you have no sweat, if lower than 30, start generic testing to see exactly where you are and what is to be done. Get a good Nephrologist. Start right now keeping notes on everything and ask questions and read and learn.
go to kidneyschool.com,
God have mercy on us all
Cicero
It could be proteinuria which could indicate a kidney problem. You should see your doctor. It sounds like a pretty good reason to be seen by your doctor. It's your right as a patient to be seen if you feel there is a need. Don't let them intimidate you.
Here is a link for you http://www.mayoclinic.com/health/foamy-urine/AN01702