Emily this is really hard to answer. You're 16 which is really old

, but you're
16 which is also really young. I'm sorry you have had to deal with this.
My experience is that drugs can certainly be beneficial in masking the pain, but they will not make it go away permanently. And the effects vary person to person, and can be negative as you are experiencing.
Have you and your dad looked into hyperbaric oxygen therapy?