Keep testing until period ?

Hi! So I need advice. My period is almost a week late (usually 30 day cycles) and I already took two tests, One 8 days ago and negative and then the second one on Monday and it was negative. Based on when I ovulated (used OPKs) it seems like if I truly was pregnant I would get a positive by now? I don’t feel pregnant and I feel so disappointed every time I take a test and it’s negative. I’m not sure what to do. Has anyone gotten a very late positive? Over 16 DPO? My question is should I keep testing until I get my period or do you think I missed it this month?