Can be if you have a cycle less then 30 days. How many days between the start of both periods? I think normal cycles are 26 to 28 days so if you have a period early in the month you could start the next one near the end of the month. Happens to me about twice a year.
Depends on your cycle. I would go and see your doctor. U will need to make sure u dont get anaemic. Particularly if they are heavy. Xx
I agree with the previous post. I would go and see the doctor....if that is not normal for you, then you should speak to your doctor.
Good luck!