Alright I keep posting about my two year old, but a lot of you guys have older children and are super knowledgeable! I need major suggestion.

My turddler is having major separation anxiety from me. I can’t even leave him home with his dad. He just screamed for 20 mins until I got back. It’s been the last week or two. I stay at home with him so we’re together all the time, and I rarely do anything with out him or baby sister, but if I leave one of them with someone it’s usually him. He’s never really had a problem with me dropping him off somewhere as long as he knows the person. We started a program at school that we go for two hours, and one of the hours we split up and he gets to play with other kids in the gym and at first he loved it, but the last few times he’s cried to the point of throwing up. I’m hoping this is just a stage. What can we do? I’m so lost.