Why do I have fluctuating periods?

Question

First of all, I got my first period 2 years ago and have yet to have a regular cycle.

Last summer, I went 4 whole months with no sign of a period at all.

last week, I had a very heavy period that lasted 4 days

this week, I thought I had my period, but it was really light and stopped after a day.

I run a few times a week, but not very much, and my BMI is 19.5 ish.. What could be the cause?

Answer 1

It sounds like you could have a hormone imbalance such as from a thyroid problem going on. The only way to know for sure is to see your dr and have them evaluate to see what they think could be going on.