Normal blood pressure?

 I went to the dr today and he said my blood pressure was 170/120 & that it was dangerously high for someone who was 20. I haven't been overly stressed but I do have an anxiety disorder. I don't know if the two are connected & forgot to ask him what a normal blood pressure was when he told me to check it or have it checked daily for 3 weeks. 
Edit** I'm 20, 5'3, & weigh 105 lbs.