Had blood drawn for an a1c. My blood stopped flowing. She said she thinks she has enough.

If she thinks she has enough... then she does. YOU have other veins she could have gone to if she needed more.

Had blood drawn for an a1c. My blood stopped flowing. She said she thinks she has enough.

Not much blood is needed for this diabetic test

It will not effect the test, if there was enough blood to test. If there was not enough blood, then they merely can not do the test, and would have to redo the test.