Stressed out?

I've been having a lot of health problems lately, I think. I feel nauseous, I get chest pains, headaches, and I'm generally exhausted from small things, like just going to buy groceries. I don't know if I'm eating loads or nothing, because I'm never really hungry and I can feel really full after eating like a banana or something, and my excessive tea drinking doesn't exactly help, so I eat even f I'm not so hungry, and I don't know if it's actually as much as it feels sometimes. I don't even know if I think I'm fat or not, I flip-flop between attitudes and moods in seconds.
I know I'm being whiny but my mother won't let me complain out loud, she's a medical doctor and thinks I'm just trying to get attention or something, and I sort of need to talk it all out.
I really don't know what to do. I don't know if I'm supposed to be doing something, or if I should just suck it up and stop being such a little bitch about every little headache.
I would go to a doctor but my mother wouldn't support it, she never supports me seeing a doctor for anything, she won't even let me go get massages for tensions because apparently my posture is bad and it's my own fault. She's really very loving but for some reason she just won't take any medical concern of mine seriously. I don't even want to see a doctor though, because as soon as I start talking about how I'm doing I sort of break down crying and it's really very embarrassing.
I guess I'll just keep doing what I'm doing, staying strong, eating, working out, listening to music, and breathing deep breaths, hoping it'll eventually blow over.