People having dream that my ex-sister-in-law is drowning. and being bit. and shes seeing ghost. PLEASE READ!!!?

it all started when her friend was sitting on the couch and when she tried to get up it felt like someone was holding her down and she couldn't open her eyes. when she finally opened her eyes she saw a ghost like female figure on top of her then i disappeared then she was able to get up.(this was at my sisters house). that night my sis was sleeping when her 1 year old starting crying. she tried to get up but couldn't like someone was holding her down when she finally got up there was a ghost like female figure on the edge of her bed. she said it didn't look like she was going to hurt her but it looked like she was right around her age. when the lady disappeared her kid stopped crying. that same night her friend that was held down early was being held down again but at her own house. before she was being held down she had a dream that they were at the river and my sister was drowning and a snake bit her. they got her in the ambulance and her eyes were blood shot read. the next morning my sisters daughter woke up and said she had a bad dream. she said that her mom (my sis) her dad (my bro) and her dads girlfriend were at the lake and her dads girlfriend drowned. but her dad girlfriend and her mom look very similar. maybe she got confused between the 2 and it was her mom drowning. but then my brother woke up that morning and said he had a weird dream were we went on Vacation with my ex sis in law and my sis fell in a pool at the shalloww end and alligators were chasing here.( sounds like the snake) but she didn'tt drown or get bit so she was fine. but this all happen within the same day night and morning?? please help were reallyy scared!!!!!!