Over the past few months, i've been having hot flashes out of nowhere. feel like im on fire, clothes get soaked w/sweat. feel like im gonna explode..

Sounds like: premature ovarian failure associated with menopause. Though you are young, these things happen with ovarian failure or something amiss with your endocrine system. Other hormones including thyroid and cortisol can also affect your well being in that way. Please proceed to a GYN or family physician for proper diagnosis and treatment.