Can miscarriage bleeding last only a few minutes?

Usually longer: Typical miscarriage bleeding usually lasts longer than a few minutes except in some cases of a chemical pregnancy. That is when you have a weakly positive pregnancy test and then have a slightly late and heavy period. Then a subsequent pregnancy test becomes negative after your "late period" or chemical pregnancy.

Yes: if it is early and cvx is dilated. if any pain or constant bleeding then u may need D&C