I need an honest opinion.. What would you do?

Ladies, I need your opinion. The only place I can get to as soon as possible is the health department, but they do not do blood tests there. There is one other place that does, but my mother works there. So should I just go ahead and schedule a blood test at my mother's office, and ruin the surprise that I'm possibly pregnant, or hold it off and just see if my faint lines get darker? I've had faint positive tests for 4 days and I'm worried that they aren't getting darker.