Need Help please, in all seriousness, to silliness.?

I'm a 20yr old woman, I have very irregular periods, (like varying from 2 weeks inbetween to 12weeks) At the moment i havn't had my period since 5th May.(they're normally very light and last 2-3 days, rarely heavy.) From doing research on the net it looks like secondary amenorrhea, PCOS? But i am cranky, suddenly have a ravenous appetite, back ache, feeling sick in the morning cos i'm so hungry, and tiredness. My stomach is also growing. Why? it's at a point now where for the past few weeks i can't sleep on my tummy, it's also uncomfortable on my side. i had something similar to this a year ago, where i went without a period for two months and got similar symptoms but never this long.
I cannot be pregnant as i am not sexually active, also i han't been anywhere where anything could have happened, no guy has been near me naked at all. Feel twitches in stomach too
Can i be pregnant stilI?
I went to docs last year they told nothings wrong
Whats wrong with me?

i can't go to doctor as i'm going on holiday on saturday.
Plus there's a 6-8 week waiting list and as far as i know all other doctors a full, where i live there (UK) is a sever shortage of places.

There is too much going on with you here to try and get an answer on the WWW.
You MUST see a physician for a repeat pelvic examination and other diagnostic studies your examining physician deems appropriate.

If it were me, I would go to clinic and camp out; stay there until you are seen. This is much more important than holiday.

You potentially have a serious problem even though you were told nothing was wrong a year ago. The diagnosis that pops into my head is ovarian cyst, but this is really bothering you physically and emotionally and it will continue to get worse until you take appropriate action.

That was then, this is now. Take good care of you because you are the only you you have.

I would highly suggest going to a doctor about your problem again! You could have a false pregnancy, where the body thinks it is pregnant when it isn't. Also, could you have been given the date rape drug or something and not REMEMBER having sex??? Or maybe there is something wrong (like a tumor) that needs to be found now. You know your body better than anyone and if you feel there is something up there is! Get a second and third opinion if you need to, but go now while it is happening. Good luck!

GO SEE A DOCTOR! - he/she may need to do a pap on you, get some history, and see if you're on birth control.

Get to a NEW doctor immediately. There is obviously something going on. Schedule an appointment NOW while the symptoms are present, so they can see what's happening.

It could be something like a cyst or something, but only they would know. If you have NOT been near a guy in a while, there is NO chance that you could be pregnant, so that's out. But seriously, only a competent doctor can give you a valid diagnosis. Don't put this off!

Your uterus is very full of waste because your period is very overdue. And you seem to have some sort of reproductive disorder. It's time to tell your doctor how concerned you are.