I'm very familiar with chiropractic and it works. A chiropractor is also just as educated as a medical doctor, so why are you talking about costs? Chiropractors go through just as much schooling and have the same amount of student debt. Why look differently upon the two healthcare professions? A chiropractor can fix you whereas the MD is probably going to just prescribe unncessary medications which will harm you. I do not know how much the doctor charged you and therefore cannot give you an insight as to whether or not you were overcharged. However, chiropractic is so worth it and it's an investment in your health. You must go several times in the beginning and as you make progress, the visits spread out. Think of orthodontics - you don't wear braces for a few days and then say you're fixed. Why are you feeling worse? You should drink water afterwards and you need to relax. Your body may be accustomed to being "out" and therefore, you may have a reaction, but it won't be forever. Talk to your doctor first as opposed to posting complaints online. I think too many people type away, but talking is best so they know your concerns and may be able to rectify things.
Best wishes for health and happiness!
PS- I have no idea who the doctor is you have seen, but I know chiropractic works and therefore, will continue to support it. Go chiropractic! The power that made the body, heals the body.