Spots, Cysts, Blood In Vomit, Etc. Symptoms Related? :(

-I'm 21, female, and basically I've had spots since I was around 14-15. Not terrible, the usual places: back, face, chest. I've been on antibiotics, nicotinamide, all kinds... nothing beats this. It's almost like my skin itself is infected. I have an awful habit of picking them, to the point where they could scar my shoulders, and I can't seem to quit. D:
-At age 13 (almost on the day), I was admitted to hospital with abdominal pain and needed surgery to remove a large cyst outside of my ovary.
-My periods are irregular. I started at around age 7-8.
-I've had gromits when I was younger, around age 5.
-A few months back, I went to a neurologist about a "tic" I occasionally got (rarely do now, it was 2-6 times a week) -no meds or anything were given.
What else... err, I'm double-jointed, so I'm told aches and pains are normal. Oh and I'm a virgin, so no chance of anything relating to that.
[/medical history]
I sound like I worry a lot. xD

I consider myself overweight and very unfit, even though I'm a UK size 14-16, my body fat (BMI?) is 40%. Most of that is on my breats, methinks. o_o

Anyway. A lot of people have been telling me that I look "unhealthy" lately. I'm taking vitamins, although I get very little exercise due to a few issues at home. I'm also always tired, lethargic and mostly apathic.
I have irregular pains, circles under my eyes, clicking joints, TMJ, dry lips/hair, and my moods are erratic. To look at me, you might say I'm Anaemic, but blood tests come back fine when I do have them.

A few days ago, I woke up feeling rather sick. Not terrible, but the thought of food made it worse. So like an hour or less after waking, I go to the bathroom and basically puke up a few times. Even after having some Chinese food the night before, nothing but yellowish bile came up... that and a few streaks of gooey blood (not much but eeep), dark on tissue.
Since then, my sides (where I imagine my ovaries are), particularly my right, feel kind of tight. Almost pulsing. My lower back (right) hurts, too. It feels taut, if that helps.
After going to the doctor, I was told not to worry unless it happened again. Fair enough, I guess. (so helpful they were... not)
So it's like two days later and I'm feeling alright, except for the slight discomfort in my right side, and I have really small but somewhat painful cysts on my labia, both sides, about three or four.

I've looked around, but I can't figure out if this is all just a case of bad luck, or if there's more to it. I'm just slightly worried 'cause my family don't need something more to worry about, and although I feel alright as in I can do things, both my appearance and the general "hassle" of physically doing things is starting to have an impact.

Anyone who can help me out with anything or point me in the direction of what could be causing all this? =/
That's all I could think of to explain things.