AF late

I'm now 6 days late and AF is showing no signs of coming yet. I haven't been feeling 100% and I have been super tired but that's not exactly strange anyway. I have been trying for 6 months with pcos and opks of all sorts and bbt. This month I ignored the opks and just did bbt and got disheartened as my temp went back down after ovulation, so I did not test after that. I'm now taking pregnancy tests, both in stream and cup which seem to be coming up negative, however my first one came up with a positive a few hours after the testing window. I'm just not sure what to think!! If it can up after that I should ignore it right!? I haven't told hubby as I wanted to surprise him on our anniversary weekend this weekend but now it's getting a little difficult!