To those of you who are also in chronic pain like my mom and I (especially since it took my mom almost 20 years to get diagnosed), I have some words of advice. If your doctor is blowing you off, no matter how much you tell them "I've been in pain for so long I'm not getting better" then it's time to find a new doctor. It's terrifying, I know. One doctor will be nonchalant, another will be borderline abusive, but there will be someone out there interested in learning more. Sadly though, a lot of the times you'll have to go out of your way and most people don't have the ability to drive 1+ hour for a doctor's appointment. There are doctors who are willing to do online appointments nowadays, where you might only need to go in person every 3 months.
If you think you have a rare disorder or some sort of chronic illness, find rheumatologists near you. If you match up to a few different disorders, it's good to see who specializes in those disorders closest to you so you can get a more accurate diagnosis. Remember, with some diseases there are false negatives. Some diseases require multiple years in order to get properly diagnosed, or you have to be in a flair up in order to catch the disease.
Remember: Nobody else will advocate for you. No doctor, no other person but yourself will be your voice. Stand up for yourself, you are worth the time and effort. Do your research, don't immediately think it's the worst think but come up with some different options. DO NOT give up.
It will take time, and it's even harder if you are a bigger person especially if you were born female. But don't let anybody tear you down. You know your body best, you know what feels right from wrong.
Keep in mind that there are people out there who understand, who share your pain and sympathize with you. Chronic illness will make you feel alone and scared. If people around you don't understand, there are support groups online where they can help give out advice and listen to your problems. That's how my mom got diagnosed with Dercum's Disease from a leading specialist, and hopefully I will too eventually. I hope everyone dealing with chronic illness get their diagnosis they need and the help they deserve. Remember to not overwork yourself, take breaks when you need to, and listen to your body when it says "rest".