acting how to cry

How do you make yourself cry when acting? also, what acting camps do you reccommend?
i want to be a television actress, and i’m always practicing monologues, but i can never make myself cry.
also, i was wondering what acting camps you might reccommed?
try thinking of really sad things that you know would make you cry, like maybe a memory or of something that hasn’t happened but would be sad if it did happen.
and for acting camps, you should look at the theaters in your area, or google acting classes in the name of the state you’re in