I am 20, female.. with height of 4"11" and weight 46 kg.. my mom and dad are shorter too.. my mom is 5"2"and my dad is 5"4"..but i really wanna grow taller...what should i do.. plz help me?

Some basics to know: The expected final height of females is the average of both parents less 2.5 " plus or minus an inch. You height is in that range. Women usually stop growing @ 16-17 when their growth centers close. After growth centers close (x-rays can confirm) no further height increase is possible. There are no exercises/diet/meds that can alter this when your growth centers close.