Talk to Gynecologist on Blood Pregnancy Test

I wanted to know can you do beta hcg test 2 days before expected period date?

My periods are expected in 2days ...my husband always use protection but The condom broke on 10th day of cycle (my current cycle is 25-26 days.. I took ecp With in hour .. I did beta hcg today and its <2.30 I am todays away from periods

As ecp effect cycle ,it can prolong days as well so i also took priomut n 3 times aday for 5 days so that the period come on time if not pregnant... ..