Help!

My husband and I have been TTC baby #2. This month has been a hard one for me. For the past week, I have had constant cramping. Nothing too severe, the pain just lingers and it's quite annoying. I have felt nauseas, haave headaches, stomach pains and have been feeling under the weather. My period is not due until 12/7. What could this possibly be?  I feel like I'm pregnant but really don't want to get my hopes up. Any advice or help 😔