“Weigh your options” means “to think carefully about your possibilities or choices”. Example: I’ve been weighing my options for the last year, as I am really not sure what kind of career I want to have in the future. Want to learn English?
“Shoot yourself in the foot” means “to do or say something that causes problems for you”. Example: When Michelle got drunk before her final exam, she shot herself in the foot. She failed the test! Learning English can be fun!