shit man on a serious tip...i feel for u...set an appt and see a dietician or whatever they called...also a doctor..make sure everything is on the up and up...i mean u might just really have a fast ass metabolism...i know dudes who have always been slim and really cant gain weight in a "healthy" manner no matter what...but..the folks i know have no problem eating..thats the one red flag i notice ....
i mean there is ways but dont risk high blood pressure diabetes etc etc just to gain weight..aint even worth it bro