Wondering and time seems long..

Hi to all! I am currently 7 days past ovulation day depending on my period tracker app but I think I ovulated 2 days earlier. So 7 to 9 days dpo and I have no symptoms except heartburns in the morning and I have period like cramps that comes and go since 4 days.. I usally don't have cramps until my period is here but I'm not due till another 9 days.. Could I be pregnant? waiting for a missed period before testing but it seems time isn't going fast.. Is there signs I that could help me know before?