Hi i'm 27, this month i am now 9 days late, i have done a few urine testts over the past 9days and all have been -ve should i get a blood test?

Late period: Reasons for missed / late period include: an anovulatory cycle in which no egg is released, marked v or ^ in weight; eating disorder; Over-exercising (endurance athletics), stress, travel, significant illnesses, oral contraceptives & other meds, Illegal drug use, breast feeding, hormone imbalances and medical problems (i.e., PCOS). Pregnancy is #1 reason. Sorry - not sure which test this is or ve