Hey sis, based on what you shared, mula Feb 28 hanggang March 30 ay abot na ng more than a month, so yes may delay ka na, I'd suggest kumuha ka ng pregnancy test na para sure, or mas better pa mag-schedule ka with your OB para ma-check properly kasi they can do blood tests din if needed para ma-confirm. A few of my mum friends went through the same worry, and honestly it's best to know ASAP para makapag-plan kayo accordingly, whether it's pregnancy or may iba pang reason ang delay!