late period, pregnant ?

so this month I'm 8 days late. last month I was 5 days late. so here's the run down, I usually never have unprotected sex but about 2 weeks ago I did and used the pull out method. we also start off having sex with no condom but then I get up to get one every time. I have take 3 tests so far and both were negative and the last one had a question mark on it, i Googled what that meant and come to find out it can be a few things like a defect or not enough hormones and so on. I'm not sure what to think, in really scared and stressed and not sure if I should believe the negative because 2 mom's i know both said they took multiple and they came out negative but they were pregnant.... someone help ease me or lend some advice this is my first scare....