i do not know what is happening

i am 18 and lately i have been feeling weird i do not know what is happening i am feeling dizzy.i feel like vomiting,i have lost appetite,i am losing weight,i get angry fast,my vigina is ichy and i have a sore on it/lump like a pimple, i am moody i just do not know what is wrong with me.can someone tell what going on