What date to start counting b4 you TEST

CoRinNe♍ • I love u Nina Marie always 💚
I was wondering so I could put on my calander when to take my first preg test...anyway I put my positive lh surge in on the 14 and when I did it changed my ovulation date to the 14th when it was previously on the 17th but like I said it changed its self so I'm going by the 14 so in order or count till next period 9 to 12 days to take a preg test do I start counting from the 14th or the last day of fertility cycle... Im in my TTW now so I'd really like to know please from anyone that knows id highly appreciate your time getting back to me :) thanks ladies