AF was due 6/2

So AF was due on 6/2, and she's yet to show up. My period has always been regular and I think I may be pregnant but I took a PT one day after my period was late and got a BFN, which is the same thing that happened the first time around I got pregnant. I ended up taking the test maybe two weeks later and received my BFP, so now I'm nervous to take the second test because I'm scared it still may say negative despite AF not showing up.