I get mine on amazon. As for your testing question I have about a 35 days cycle and I start on day 9. Your cycles are a bit longer than what is consider normal you may want to speak with your doctor about that. I test with the first pee of the day but that's because I use the clear blue easy fertility monitor and that what it says to do. When I did use the others I tested twice a day for a few cycles to figure out when I got my positive and then tested around that time after that. Good luck!
Haha oooo I'm in Australia, QLD so yehhh... No Walmart n stuff down here haha but thanks anyways x :)
I don't remember the brand but I got some at Wal-Mart a few years ago and it's just little strips of litmus paper there where I think 50 strips for 8 bucks check Wal-Marts website also cvs and Walgreens should have something similar if no luck there try amazon.... good luck ♡