When did you get your bpf/first signs? Losing hope.

According to app I'm 13 dpo and due af tomorrow. I've tested with cheap amazon tests, clear blue plus and early detection and more sensitive 10(can't remember unit measure) tests. Nothing. I take a conception vitamin everyday and try my best to watch what I eat/drink (its lockdown AGAIN and we all have our comfort foods) but still nothing. When did you all get your bfp's? Should I continue testing or just give it up and try all over again next month?