sinisin

so i have a bit of a problem, i'm in so much pain from my knees that i have to take pain killers constinly and thats all good but over a long time i hear that they will decrease your sex drive and shit, now i never had a problem before but they are talking about having to take them for a very long time and maybe even the rest of my life if my knees don't start hurting. and on top of that they don't even know whats wrong, its been 9 months that they have been checking out my knees, i've had x-rays to mri's done and they have no clue, wtf!