Sleep troubles

So my LO slept really well from about 4 weeks, she used to sleep from 7 until 9, feed then fall straight back to sleep until 2 or 3, feed then back to sleep until 8am. She seemed to go through a growth spurt last week where she woke every 2 hours through the night for feeds and it was every hour through the day. She's settled through the day now however she is still waking so much more through the night. Any advice on how to get her to go back to sleeping 4-5 hours? She's 3months now