From personal exp don't give up just because of bleeding. Ask for every 2nd day blood texts to confirm numbers are going up.
The plug does not seal over until 8ish weeks so until then bleeding can happen due to the uterus stretching and pushing blood out.
I bled for 11 days with all 3 girls. It went from I would say a day 4 bleed to light spotting. I never had cramps and never had clots. It was a horrible wait for it to all stop but the bloods helped seeing the numbers going up up up.
The one baby I did mc I started to bleed 2 days after af was due and I had gotten bfp on tests. I just suddenly felt no longer pregnant and I had cramps and clotting. But with the other 3 girls I always felt preg and kept the way I felt. Good luck :-)