cramping

Courtney
Hi everyone, 
I had a quick question. 
I am very newly pregnant. Almost 4 weeks.  My AF would be due tomorrow and today I am having cramping like I would be getting my AF. 
I'm super nervous, we had an early MC in November, we found out we were pregnant then a few days later I got my AF right on time, blood work confirmed the MC. 
Hoping this is normal. My levels went from 17.5 to 62.7 in 2 days. I have another screen Friday.  
Anyone else cramping??  It's in the far right and left in the pelvic area.