Kikilala, my girl used to wake up every 2 hours. i gave her (& myself) a lot of excuses - growth spurt, teething, rash, pacifier drop, separation anxiety etc. etc. - but we finally decided that what she really needed was to learn how to sleep. so 2 weeks ago, we began.
by the 2nd night, we saw improvement already. & within a week, when we put her down for naps and bedtime, she usually wouldn't cry. even if she did, it's only for a minute or less.
at night time, she still wakes and cries a couple of times, but also quickly quietens. (less than 5 mins)
the last 2 nights, around 4am, she will wake up and cry longer. last night we realised she pooped so had to clean her. after that, she had some difficulty getting back to sleep.
i'm still waiting for the magic night to come.
but things have improved so much already.