Just got BFP--light cramping

Kay
Hi all! Just got my BFP on the digital two days ago. This is our first cycle TTC and we are so excited!! 
I think I'm about 3weeks and 5 days (according to Glow)...and I'm having very light cramping. (Less than period cramping for sure) is this normal? Has anyone else experienced this and had a normal healthy pregnancy? 
I guess I'm worried about the beginnings of a chemical pregnancy /: