Has anyone had a d&c/ d&e?

My baby stopped growing at 19 weeks and I had the option to either induce labor vaginally or do a d&e. 
Well I'm doing the d&e route because it's fast and emotionally better for me. 
I just went to my first appointment where he inserted the laminaria into my cervix to open it up. Well, that was done at 2 pm today, and I've had non stop cramping ever since. No bleeding or anything just constant cramping. Is that normal? He said I will be experiencing cramping after, but didn't say if it would be constant or not. 

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