How to Gain Weight??!! Workout or Multivitamins pill

[Robelus]

Hi there, I'm having a very hard hard time gaining weight and would love any ideas out there. I tried goin to the gym to get a personal trainer to gain weight but fail (1 month). I tried eating at night since my doctor recommend me that, didn't work. I tried organic multivitamins 7 different pill (called Forever Alovera) was able to gain 5 lb but my eating habit change and didn't like it. I eat fast food everyday, i dont pack lunch, its been take-out for 8 yrs now. I was planning to go on Birth Control pills cuz i heard that u can gain alot of weight but im scared of the toxic that it contain. I even gave birth twice , gain 45 lb then lost like abut 60lb. Is there any other method out there.