My baby is is almost 9 months old and this week she has had some serious separation anxiety. She has…

My baby is is almost 9 months old and this week she has had some serious separation anxiety. She has never been this way before, I use to be able to sit her in the floor, pack n play, or bouncy and walk away for a short period of time with no worries. Now if I even attempt to walk out of the room she screams like someone is hurting her. HELP!