Um, so i really dunno what my question is. Its just...Im 20 years old, and ive had all sorts of problems growing up but never really went to the doctor for anything, except when i got sick because of my tonsils, they would swell up (whatever the would is) and it constantly happened to eventually got them removed when i was 15 after i discovered i had severe sleep apnea.

So i guess the problems i have is...chest pain, back pain (majority of the time is just feels like tons of pressure is building up in my back and chest, and the only way to relieve it is to tense up and press against my chest, it really hurts when i release the tension, but it feels amazing without the pressure. It returns after a second though)

Another is stomach pain, i have it too much to be normal. Sometimes its every day and it can get to the point where its really severe.

I sometimes get pain right under why rib cage on the left side and its horrible.

I get joint pain on my right knee a few times through out the year and it hurts everytime i move it.
(I am overweight, so i know that probably contributes to alot of my problems)

Ive always had dry mouth growing up. I hate it.

I started getting like...these cyst things on my vagina when i was around 12. They used to pop up alot then they slowed down.
Ive never had a steady menstrual cycle. Usually it was i got it every other month or longer, then it turned it to not going away. The first time was about 4 months long. The longest lasted for well over a year. Id cut off for a little bit sometimes, but would come right back during sex. Mentioning sex though, ive always had intense pain during it. And it used to make me bleed all the time.

Ive begun noticing the my hands shake alot. It was pointed out to me, but i never knew it happened.
I hands always its horribly uncomfortably stiff, so i pop all the time. Ive noticed a huge knot popped up on the back of my hand, that moved with my tendon, it was there for some months but since receded, but now i noticed a bone like growth on my finger joint, its like a hard bump on my bone.

Another problem is, just a couple days ago, it slowly started feeling like something was stabbing with all over my abdomen, the pain was so severe my stomach cramped when i moved. Pressured built up into my chest and everything hurt extremely bad, my chest has felt strange every day and my stomach slightly gets the same pain everyday.

Over the last couple months or so, i started seeing black things in my poop, along with mucus, which i already had alot of.
My stomach starts hurting from standing for too long.
And the pressure in my back and chest build up really bad the longer i sit or stand up.

Also, my mom has thyroid problms for a little history. And her sibling has thyroid problems. So she always told me i should get checked but i never got checked growing up.

Thats all i can think of for now.
So my question is, if i went to a doctor and told him all that, would they think i was a hypochondriac? Or if they dont, what kind of theories and stuff would the doctor think about whats wrong with me? What would i be told to do?