Thanks! I have the digital one that tells you yes or no. If its ur surge or not. So I went ahead and started it tonight. I dont know anyone who has relied on these...did you get pregnant using yours?
I always used the digital ones that show a smile face when you are getting your surge. I'd usually start testing around day 10 (as I ovulate somewhat early in my cycle). The ones where you need to compare the line to see if it gets darker may require that you start sooner, but for the digital ones you'd still be fine to start this cycle. I never used the other kind, hopefully someone else chimes in!
Good luck!