Hi Sue,
One of both mine and my parents biggest worries about me going onto the meds was the risk of long term organ damage.
My Doctor warned us that if I took some of the meds for a long period of time, I could possibly suffer from long term organ damage or become dependant on them.
None of the meds really helped me so I decided to come off them as I didn't really see the point in being on them if they weren't doing anything to ease my pain and could potentially make me worse.
Another one of our biggest concerns was the potential for the meds to mess around with my hormones because of my age. My Doctor told us that they could cause my hormones to go out of whack and lead to more problems in later life.
I certainly understand some of the fears that you have and think they are completely normal! It's soo hard sometimes knowing what will work and what wont and what choice to make.
I think it's a matter of weighing up the pro's and con's and seeing what you think is the best choice. You know your body better than anyone else and it totally has to be your decision!
I really hope that the meds help you should you choose to take them and you're in my thoughts!