working too physical?

Meg • :-)
So I work with children who have Special needs, frequently when they are upset they get very physical. Lately I am blocking a lot of kicking/ hitting and aiding kids as they get down from tables or higher places. Sometimes they appreciate the help sometimes they fight the move. Anyway just saw BFP - I'm about 4 1/2 weeks. 
Should I be avoiding the more physical situations? Is there a lift limit? 
Or a point where I should let my boss know that I may be stepping back more when a child is at risk of hurting me.