Ughh. why am i so exhausted and tried all the time if i get enough sleep? even small activities make me tired.

Many many causes: Possibilities include poor nutrition, sleep apnea, various medical disorders such as anemia, diabetes, or thyroid disorders, psychological factors such as stress and/or depression, and many others. It could even be from overwork or overexercising. While it's easy to provide a list of possibilities, your question can't be answered without more info. See a doctor for a personalized assessment.