Does it mean ovulation is more likely to happen sooner than 24-48hrs? As in is the surge happening now? This is my first cycle using them postpartum (about 14 months postpartum), and I finally got a positive just now on cd 18, after work with a 2 hr hold. I wasn't able to test earlier today at work at all. The test line immediately came up and is super dark. Previously, it's been so light and wimpy. I've never had a positive that dark when previously TTC. Does it mean I'm in the middle of the surge or something?