You are supposed to drink about 8 8 oz glasses a day (although it can vary from person to person depending on your size, certain activities you are doing throughout the day, pregnancies, etc).

I normaly drink like maybe 2 sodas a day and 2 glasses of milk. Normaly dont drink water much but laitly I been trying to drink 2 liters a day.

2 liters is good. Actually a recent study found that you just drink when you are thirsty and not to worry about the 8 glasses a day. It's going to end up different for everyone how much they need depending on body type, age, activity level, climate, elevation, etc.