I Have Questions !!

Where can I buy the ovulation test with the strips, how much are they? Can I get a bundle? I don't want to start tracking my ovulation because I have been trying for baby #1 and it's already been four - five months and it's very discouraging. I don't think I'm unhealthy or have any issues to check, I'm pretty young like twenties young and don't undertsand the only thing is my SO is older by ten years but i promise you I can see his boys swimming in the semen.