My 7 And Half Weeks Baby Sleeps Very Less Almost

My 7 and half weeks baby sleeps very less almost 4 to 5 hrs only at daytime., during nights less than 2 hrs... she has burping and gas problem... strains and releases gas... my pediatrician suggested colic aid twice a day... but I don't find much improvement.. does she have a sleep deprivation problem..
Kindly Please guide me and give ur suggestions..