In one part of your question you asked for a name of a specific doctor to be recommended, but unfortunately that would be impossible or at least unethical to give you a specific recommendation when we don't live in your area and know the doctors.
In the case that there were any pain physicians in your area that you had not already seen, I offered you the search engine so that you could look more thoroughly for them. You replied that this would not helpful, but asked for the differences in the two medications again. After spending time getting the information and putting it into language that you would understand, while also being sure to leave you links to the more indepth information, in the case you could understand the more complicated language, you reply back saying you already know all of this. If you truly already know all about it, then why would you ask for it again?
I answer inquiries here to help people, and do not mind so much when I do not get paid especially if an individual does not have much money or has no insurance. But if I don't expect to waste my time getting information for someone only to be told that it was a waste of time because they already knew the answer. I could have been helping someone else! It is careless, disrespectful, and really down right mean, not only to me, but to the other person out there that really needs help in finding an answer to a specific health concern.
I do feel for you and understand that you have been through a lot and it would be quite normal and even healthy for you to have anger and resentment about this. It would also helpful and more appropriate for you to see a therapist or join a trauma survivor support group in order that you can express your feelings about this and which will help you to work through it, rather than instead taking it out on those who are trying to help you.
A type of therapy called EMDR therapy would likely help you.
This is not an easy thing for me to do this, to tell you this information, and I could have just not responded at all. But again, I do want to help, and by giving you honest feedback about your response and and what must be years of pent up anger and pain (rightfully so, by the way) is ultimately going to be more helpful for you, than for me to say nothing and to let you go on striking out at others, and likely continuing to alienate yourself and push others away from you. Instead you can find a place to express your anger and pain and work through it. Once you do this (find a group and therapist so that you can learn to express your rightful pain, resentment, and anger in more appropriate ways) you will likely loose at least 75% to 100% of the pain and discomfort that you currently still feel. Anger and tension held in the body for so long, tenses the muscles, causes one to breath in an unhealthy way, and prevents the body from healing.