Please help, genuine advice needed!

I'm 27 suffering from ovarian cysts and endometriosis symptoms. Currently experiencing severe pain in the left side (from lower pelvis to hip and down to knee) and it only subsides when any painkiller is working and when its effect stops the pain begins to come back!This pain arrives right after my periods stop and stays there for around 14-15 days. Every gynaec I've consulted, suggested me not to go for surgery as they think even a surgery won't help curb the pain. Currently either only Mefanemic acid is working or Tramadol. Only these are relaxing me in this dire pain that is absolutely unbearable.  Can you tell me if I can take Tramadol (1 each day), and if it won't affect my kidneys and liver, until I get any permanent solution to this pain?  Or if there's any other easier and safer way, because I can't really bear the pain when it occurs, no matter how much I can tolerate, eventually I end up taking a painkiller to relax myself! I request please give suitable advice, thank you.