Just keep doing it man. You're not gonna get huge in 1 month. I'm 20 and still have hard time gaining mass. I've slowly gained 15 pounds after 1 1/2 years of working out. I'm guessing you are built just like I was. You'll have a hard time gaining weight just due to super high metabolism.
'16 BSM 340i M Sport + Track Pack.:.M Perf Exhaust.:.Polished BBS RS-GT.:.JB4.:.BMS Intake.:.H&R Sport.:.