Is this feeling something you would like to talk about?
If your goal is to find a mentor who can help encourage you the category that it would fall under would probably be Academic
Some of the reasons can be:
If you're a pre-teen or a teenager who has only started menstruating, you may find that it takes a while for your period to settle in and become regular.
I couldn't think of anything else, but hope this helped enough!
To find the best answer, ask your mom!
~Aurora