Drinking more is this normal?

Okay i will be 6 weeks pregnant tomarrow. and well normaly i drink 2 44oz gles of water in a day. and now i have been drinking 1-8oz gl of milk 2-8ox gles of OJ and 5to6- 44oz cups of water in a day.. is this normal? i know i drank alot with my first 2 pregnancys but well i did not keep track of anything and this time i have been keeping track.. and no i have not been ot side much i know its not from the heat. i stay inside in the AC and when im in the car im in AC.