10 dpo pos opk?

Shelbae
So i had 2 surges, the 12th and the 16th... slight spotting during FMU then nothing on the 19th.. took an opk today for gigs because a girl on my post just got her bfp today.. dont wanna get up to get a hpt. I had a dark second line... heard they can pick up hcg. Thoughts? Gonna buy a hpt asap but im trying not to get my man excited and we share a car..