Close/cover all the windows
Make a little tent area or something where you cannot be seen from the door or windows
Cover yourself with a blanket or stack stuff up in front of you to where it looks like anything else
Get something that gives you comfort and keep it close
Make sure all the doors around the place you live are locked, maybe including your door
Get something with you that you can use for self defense
Try not to breathe rapidly and if you cry then try to do so quietly
I dont know if i missed anything, but if there is a room that your more comfortable in/feel safer in then go there