Yes its perfectly normal. Its basically rotten blood, that's why your body gets rid of it!
If you have black blood from your period that is normal if it comes out when your not on your period than go to your doctor and get checked.
That is what a normal period looks like. It's the fresh blood after the uterus wall is removed. The blood can also be rust colored when it starts to dry up and almost black in the beginning when it's old.
Darker than normal. Almost black.
This is normal and can be seen at any time in the cycle.
It is normal for menstrual flow to contain the stringy black things you have described. They are probably small blood clots.
yes its normal to talk about almost everything except girl stuff
Yes something is wrong. You are suppose to have a normal period every month.
It is not necessarily abnormal, but should be discussed with your doctor anyway.
40 weeks is a normal period. So almost ten months.
people develope at different spees its normal dont rush it
Yes quite normal, I have two daughters one started when she was 11 and the other only started at 17.
Not at all. Bleeding red and or brownish black while on your period is perfectly normal because when its red its just blood obviously but if its brownish black its just discharge usually occurs near the end of your period but it happens in between that's nothing to worry about :)