How can i get my 7 month old to sleep through the night?

my baby is 7 months old today...and when she was about 5 months old she would sleep through the night..from 10 to 8...when she would wake up i would put her pacifier in her mouth and she would go back to sleep...well when she got 6 months old i had to get her pacifiers bigger...i had her on 0-6 month on the nuk...but i switched her from 0-6 to 6-9 and every dince then she hasnt took that pacifier at all and she wakes up about every 2.5 hours...any suggestions???? o..by the way she wont eat any baby food or oatmeal she will only eat table food...and it aint like i dont feed her enough cause she eats table food about 3-4 times a day....please help...