Feeling discouraged

I’m 13 DPO or so I think. I had ewcm when my app said I was ovulating thought it was correct, it’s now 13 days later and I have extremely watery CM and ewcm again. Took a few test, all were negative. Feeling like I’ll never get pregnant. I’m insanely moody, one second I’m happy the next I’m annoyed and irritated. I’m slightly nauseous but only in the evening. Had super slight lower back pain. I’m not normally the girl who gets PMS. I’m normally pretty normal when I get AF, doesn’t normally change my mood or feelings at all. I think I’m just frustrated with not knowing if I’m pregnant. Ugh, I’m so upsettttt. Somebody say something encouraging.