Man stress is horrible isn't it? So happy that it did work out for you eventually, especially on your second cycle. I hope we'll be so lucky!
I had a 30-day cycle last month, so I'm probably going to wait until the weekend of the 21st to test. A couple extra days won't hurt and I feel far too stressed before work to test since I'm usually running around with my head cut off. I've banned myself from keeping a stock of preg tests on hand, so just have two. Last month I tested early and it sucked seeing the BFN. Though I'm sure I'll change my mind by DPO10 again lol