My care coordinator received a letter about my PIP. Anyone else had this? How long for decision?

Hi im new here. I applied for pip 17th August didn’t hear back from them till i got a random call on the 18th Jan . It was a women from the assessments she said she needed to ask me a few questions to see if I needed a telephone assessment or a f2f. It only lasted 10 mins and at the end she said congratulations you’ve completed your pip assessment. I got a text a few hours later to say they’ve received my written report. Then on 27th Jan my care coordinator received a letter from Dwp about my pip . She said she would complete it and return it on the 28th. My question is has anybody been through this process? How long do you think I will be waiting for a outcome ?. And would having children affect my claim ???? I’m so stressed with it all I’ve not slept for days.