I am 18, in college, unemployed, and a single mother of a growin toddler. i'm 5'3 and 104...?

i can't eat. just half a pb&j sandwhich fills me up. i dont have the staminia to even walk up the steps and i have a very heavy son. i dont sleep good because i'm up studying til 3 am and have to be to cl for 8 am. i want to gain weight but i can never find the time.. HEEEELLLPPP!!!! ]: