No period for 5 weeks now what should i do im really scared?

Check for pregnancy: First, if sexually active, check a urine pregnancy test, if negative or no sex, than await if you miss a second period. If you miss a second period, than you need to see a gyn doctor for evaluation of "secondary amenorrhea." if pregnancy test positive, see an ob/gyn for an evaluation. Best wishes.

Please Clarify: You did not include any menstrual, ovulatory or sexual history with your question. We need more information if you want a valid answer.