Pregmate verse frer

Hey ladies ... 12 dpo today have 4 more days until AF's due date. I know the hcg is negative! Took a lh opk just for comparison it helps with my line eyes for the hcg!

Question... does anyone know the sensitivity of the pregmate verse frer? I'm debating on going out and buying a frer today or just waiting until AF due date to see if I start or not.

Reason I am soo antsy; I am going to a concert tonight and I am conflicted on if it would be ok too have a few beers or not!