16 an know one knows whats wrong with me

Hi im 16 years old and for the past 3 months iv been dealing with a sicknss that has gotten worse over time.

It started off that every time i went out an drank i would be up all night till 10am the next morning feeling like i was going to be sick, and always needing to go to the bathroom to do number 2.
i would start shacking like crazy an all my body would tighten but i wasnt cold i even tryed having a hot shower but it did nothing.
after a party one night i did actully chuck this green liqued.
this is how it started so we thought i might have become ellergic to alcohole
but then i started getting the same symptoms if im awake for to long so by 2am if im still awake i start getting sick an cant sleep witch makes it worse
if iv had a night of being sick like this i spend a whole week getting over it where everything i eat an drink makes me want to be sick and now im dealing with headaches ontop of it.

i have been to 2 doctors who have both said i have an inflamed stomic an given me pills which dont do anything my blood tests came back fine so the think it may be stress but im used to getting sick from strees and nervouse or lack of sleep this is a whole lot different and its killing me as i cant consertrat at school or i cant go to school or sport

i am also lossing weight even if iv been eatting.

please can anyone help iv had crohns suggested but im not sure if it fits in to what i have or not

thanks