Yes, it could be but don't worry yourself because that can happen with periods too. Its hard to tell when you're not very far along.
A miscarriage should not prevent you from becoming pregnant again.
Not knowing and not being pregnant are completely different things. If you are pregnant, whether you are aware of it or not, you can have a miscarriage. If you are not pregnant then you cannot.
It can happen as soon as the egg is fertilized or attached and you will never know you were pregnant. The most common is in the first trimester.
You can't have a miscarriage if you are not pregnant
No you can't get pregnant while slighty bleeding fro a miscarriage!
yes you can get pregnant again if that is what you mean.
yes,miscarriage is a great risk of a 3 week pregnant woman.
Does 5 month pregnant woman take medicine for miscarriage?
Same way you did before. About 1/4 women have a miscarriage and there are usually no problems getting pregnant afterwards.
You can have a miscarriage through out the pregnancy for different reasons.
Yes you can have two miscarriages in a row
Yes you can.