Sleep regression in my 3 month old


So my lo was sleeping all night waking only to feed since she turned two months old.

But now all of a sudden since she turned 3 months she keeps waking up every hour from 2 am.

She is not hungry she just wants me to take her in my lap and she immediately falls back to sleep, only to wake up again in an hour or a half hour

Is she having some issue or is this just a phase ??