I'm worried about you Hun! Is there a neighbor's house you can go to? If so, please go there and call the police. This is a potentially dangerous situation. If they are high and confused and yelling at you, they could become violent. Your safety is paramount! Leave the home and call 911! Do not go back to the home until the police arrive.
When the police arrive be sure to tell them what you found and the items that are missing. Ask the police if there are any forms you need to fill out to file an order of protection. Then please change your locks.
Stay safe!