being ill

I am always ill, extremely tired where I feel really shaky if I concentrate on something too long. always. feeling like I'm gonna vomit and having  bad stomach pains. And my throat is swollen because it has ulcers on. Can someone tell me wtf is wrong???!??!!  It's been months 
I eat healthy and sleep plenty and am 16. 
I am going to the doctors in a couple weeks but has anyone gone through something similar and what was it 🙄🙄🙄

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