If such thoughts and feelings persist for days or weeks, or if they interfere with your daily functioning, then you may be depressed. You may also experience behavioral changes (e.g., isolating, drinking alcohol more frequently, using drugs when you ordinarily wouldn't). These difficulties are normal responses to the changes you experience in college (adjusting to a new environment, changes in stress) and in life in general (relationships, grief and loss). Sometimes, you may not be able to identify a specific cause and there are many strategies you can utilize to manage these symptoms.