how much longer ?!

So this would be my first time posting. I would have posted my concerns earlier but sometimes i see such negative comments, and like others TTC is a very sensative subject that i dont want to get judged or discouraged on. So here goes nothing !! So im 1 week late ... ive taken 2 test one at 4 days late and another at 6 days late and both BFN. Which was so disappointing since i have never been this late. My period is a bit irregular but its usually 2 days earlier than when it should have started, or 2 days later than when it should have started. All ive felt is extremely tired and my boobs feel a little heavier nothing else. So what should i do ? How much longer should i wait ? Has anyone tested gotten a BFN waited one more week and got a BFP