Thank you for your time and explanation on the Renal Vein.
When the left renal vein is located between the aorta and vertebrae and drains into inferior vena cava, it is known as a retro-aortic left renal vein (RLRV). This is an anatomical variant of the normal course of the left renal vein, seen I about 2% of population. High pressure in this vein can trigger urological symptoms. However, it cannot cause the other symptoms you are having. Take care!
The medical advice given should not be considered a substitute for medical care provided by a doctor who can examine you. The advice may not be completely correct for you as the doctor cannot examine you and does not know your complete medical history. Hence this reply to your post should only be considered as a guiding line and you must consult your doctor at the earliest for your medical problem.