Sims bug

Hello,

Sinds i think.... 3 weeks... sims is acting weird. 

My sims can get food, they drop it when they pick it up from the counter.... my child can do it. 

Then..... They had issues with infants.... they were bugging if i picked them up and now with todlers... its also no interaction...

Same with homework for kids... they go T-form en bug...... i am hopeless.... i delete my CAS... i openend a new save file.... I HATE IT SO **bleep**ING MUCH