Ttc for 10+months

I'm really getting annoyed 😒 with this whole ttc . I just knew for sure this was our month. As I did ovulation strips for the 1st time this month. Which I did on a Thursday neg Friday positive Saturday positive then Sunday the 9th of July which was neg , so I know I had to ovulated the Sunday. Now here it is 8dpo and af decided to show her ugly face . I'm starting to get a lil discouraged . Anybody else going thru this . I could sure use some encouraging words. Tia