Do women usually have symptoms or know they had a miscarriage or are having one?

Do women usually have symptoms or know they had a miscarriage or are having one?
I am speaking a little more on the 7-12 week span.

Anonymous2014-03-19T08:24:08Z

When you are miscarrying, you usually bleed. It's like a super heavy period. You could have cramping that's similar to period cramps. You would most likely know you're having a miscarriage. You just feel like there's something wrong and there usually is.

If you fear you're having a miscarriage, you need to get to the hospital.