Hi i have only just read this post so here is my two pennys worth
I have only one kidney since birth like yourself only found out about it
after being admitted into hospital 2007, with stage three renal failure ,if you
have not been given a appointment for a KIDNEY SPECIALIST ask for one
so he or she can check you out correctly,as from now on DO NOT
TAKE ANY TABLETS OR MEDICINE with IBUPROFEN; this is very bad in fact as I
found out dangerous for your Kidney ,talk to the Kidney doctor and he will
give you the right answers ,not your GP , I used to have check ups every 3 weeks for
the first 6-9 months but now have 6 monthly checks , you may be given vitamin D
tablets to take , also need to adjust eating habits as certain Food products are bad also
your SALT intake maybe one thing he will mention about reducing , hope this helps
have a read through the links shown below
HERE