Pregnancy after D&C

Evelyn • John 3:16 ✝️ Fit mom💪👦🏻🤰🏻
So I had my D&C done on the 11th last month my fiancé and I have had a lot of unprotected sex, I haven't had my first cycle.. My stomach has been cramping on and off for the past three days and one of my nipples feels it's literally on fire.. 
But my question is.. 
How did you find out if you were pregnant before your cycle and what convinced you that it wasn't just hormones from your last pregnancy? Did you test? How long did you wait to test? 
Any advice or experience that y'all have been through would help a ton! 
Also
I'm sorry for you loss.