I strongly agree with stronglady! Have a long talk with your Mom, tell her that you would really like to see a new Dr. You should not be put off by your Dr.! Sara is right, this is not normal and you need to be checked out by someone competent.
As far as thinking like you are a hypochondriac, it is common for people who have a lot of pain, a lot of unexplained, or undiagnosed issues to get to the point where they think ..maybe..it is all in their head..especially if you have a Dr. who is telling you so. I'm telling you, though, until you have a thorough workup to explain the issues you have, you cannot be told this, nor should you believe this.
Your family history and your mothers' visual accounts along with your story, should be enough to get you to a new Dr. that will listen.
I want you to sit down and start thinking about all that has been going on and start writing it down. Try to remember when it started, what happens, what kind of pain, where the pain is, how you feel, how long the pain lasts, be as detailed as you possibly can; it can and does matter. Then, I'd like you to start a diary, every day write down if you have had pain (Y/N) where the pain is located, how the pain felt (sharp, burning, dull, achy, etc.), when it started, how long it lasted, what you took for it. I'd also like you to start writing down what you ate during the day.
All of this information will become very important to the right Dr. It will show him/her any patterns and it will help you to remember details, because it's difficult to do so. I know this sounds like a lot Ele, but please try to do the things that I've listed and then make sure you let us know what is going on okay?
Hang in there..