6 month old sleep routine help?

My daughter will be 6 months on May 9th and she won't sleep through the night yet. She wakes me up 3-5 times just from 11pm-7am. My oldest daughter was sleeping through the night by the time she was 4 months old so this is a little strange to me although I know all babies are different. My 6 month old does take a pacifier when she is sleeping and when she wakes me up I usually have to put the pacifier in her mouth and then she goes back to sleep. She will wake up at 7am and usually fall back asleep until around 9:30-10 am and then she is up until about 1 or 1:30 and takes a 2 - 3 hour nap and then she is ready to go back to bed around 7pm for a few hours. I think the 7pm nap is what is keeping her up all night but how do I keep her awake from 7pm until a normal bedtime.. I'd say around 10:30pm? Could her nap routine be the problem of her waking up so much at night? I need some suggestions because I feel sleep deprived!!