When to do a pregnancy test

Litesha
Hi all. I am just after some advice, I was meant to come on my period today and I haven't yet, I've had abit of discharge with a pinky look to it. I feel like I'm getting pregnancy symptoms such as, backache, not feeling as hugry, feeling really nauseas, my sleep pattern has changed and my boobs have quite big. So I've been taking pregnancy tests all week and on some of the tests I can see the most lightest faint line, but it hasn't got any darker, If I am pregnant ill technically be classed as 2 weeks pregnant, will it show up on the test that soon? Someone help me please!! X