Hi mama! That sensation is actually pretty common in early pregnancy, a lot of us feel weird pressure or heaviness down there dahil sa hormones and increased blood flow, pero it's always better to mention it to your OB just to be sure everything's okay, lalo na since you're still very early. A few of my mum friends had similar feelings and it turned out fine, pero walang harm sa pag-check lang para sa peace of mind mo. Take care!