Bibbity is Missing

I let Bibbity outside around 8 am on Sunday and she hasn't yet come home. In the past, she has disappeared for up to 5 days at times, but since it is winter now, I fear the worst. And the time she was gone for 5 days it turned out she was trapped in my landlord's garage. However, I have check the garage and she is not there. Bibs is the youngest of my kitties. She came dashing across the lawn about 4 years ago and settled herself on my chest. I was lounging in the outside lounge chair. She is the sweetest of my cats, friendly and not fussy. I feel sad and pray that whatever happened she had little pain. I love you Bibbs!!!!!