Chemical pregnancy/miscarriage

Elizabeth • TTC#1. 5 years and counting. Waiting for our little miracle.
So I have been taking different steps for fertility this passed month and I had my period a week early. I talked to my sister in law about it and she said the same thing happened to her this month and she thinks it might have been a miscarriage or chemical pregnancy. Now that I think about it did hurt a lot and I was sick and throwing up all day for my first day of my period. What do you think? I guess I'll have to go to another doctors appointment to see what's going on.