Okay ladies I need help. we had sex a week ago and just for fun I took a test. I see a faint line.…

Okay ladies I need help. we had sex a week ago and just for fun I took a test. I see a faint line. and the test said no matter how faint it is, it means pregant. now of course I'm going to take another one in a week closer to my period. but I have drill next weekend and so my question is if I went and got a blood test would it show up, since it kinda shows up on the pee stick?