Why do people not take my pain seriously.

(18f) is it because I’m young, a woman? Why I’m in pain all the time, people either ignore it or just straight up tell me I’m fine and just being dramatic. I’ve learned to just pretend that I’m not hurting cause if I look like I’m in pain all the time people think I’m looking for attention. I’m not looking for attention I’m looking for help. Every doctor I’ve gone too have said I’m fine. The only tests I’ve gotten done is blood test, that doesn’t mean shit when my bones and muscles ache.