Bleeding with big blood clot 10 days before my period when pooping (after 4 days constipation)

Hi all, Today I've experienced bleeding with big blood clot when wiping my v to confirm after I pooped(4days constipated) as i saw blood in my stools. So I've double confirm where the blood came from. So I've confirmed they are from my v. My period are regular and is 10 days away. I'm feeling more cramps and uncomfortable at my womb areas. The whole noon and evening don't have anymore bleeding. Right now at night, currently in kkh having my blood test, when I pee there's abit of bright fresh red spots. I've never experienced Such a big blood clot during my menses or before my menses. I'm so helpless and scared. Anyone know whats happening?(I'm not sure if I'm pregnant since it's 10days away my period)