(Urgent) Bleeding after transvaginal scan at 6th week preg

I visited my OBGYN for a scan (6w2d). The scan showed everything good, even saw heartbeat. After 1 hour on my way back, I experienced heavy flow of fresh blood with no cramp at all. And after this I am not experiencing any more flow or pain. I am very confused because I just saw the heartbeat and everything was good, so suddenly how could this happen. Could this be due to cervical irritation caused by the scan itself? Has anyone experienced this before? I feel perfectly normal (no period cramp kind feeling). Would really appreciate if anyone who faced this can reply soon. Thank you 🙏