When to take test!!!

Laura
First time posting!! 
I took noresthisterone to delay my period during honeymoon, my cycle has been messed up this past month, I don't know when I'm ovulating or due on my period. Right now is my normal due date, the past week I've had cramps, extreme moodiness more than normal pms, I've been so tired as well. On Saturday I had a light bleed but nothing more since... 
My last period after taking the pills was 4th Nov, could I be pregnant and when shall I test? Is it too early? 
The not knowing what my body is doing is so frustrating I just want to be able to TTC properly! 
Anyone else had any experience with noresthisterone? 
Thanks X