If you are just starting it may take as long as a year.
it can last up until either the person causing it stops or up until someone has sorted out the problem
It can take a few weeks to 3 months.
Until you end it with a period, exclamation point, or question mark.
This is probably your period. A pregnancy test will probably be more reliable if you wait until the bleeding stops.
after the blood circulation stops how long does the brain take to die
about a week or more
If you don't have your period you are not ovulating so no. However, if you are menopausal it can take years until it's over so it depends on for how long you have not had your period.
about 10 stops
It will depend on your speed plus comfort stops, refreshment stops, refuelling stops.
it depends on the airline you take and how many stops you have.
Assuming that an average speed of 65 mph can be maintained over the period, after allowing for traffic, fuelling stops, comfort stops, rest breaks and so on, it would take just over 30 hours and 46 minutes.