yup - get to your Dr ASAP to be sure. I've had irregular periods before and at that time it was directly related to stress. My OB/GYN ruled out all other causes first. I have irregular periods now, however, I'm in the age for menopause. I keep a yearly app't with GYN and that gives peace of mind that I'm doing all that can be done to screen for any issues. If something is pre-cancerous my hope is that it gets caught in time. I'm so sorry to learn that you lost your mom to cancer. It is very wise of you to get checked out ASAP as you know you have family history.

Good luck