How much cramping is to much?

Annie • 💍10/7/17💍. 🦄Mom to a beautiful baby girl🦄 .

I'm 6 weeks pregnant today. For the past 2 days I've been having cramping on and off. It's not super painful just a dull pain. I'm not having any bleeding. I had an early miscarriage in January and I'm sort of freaking out.