5-weeks Post-MC, uterine pressure?

[Mamabel]

I had a D&C after MC on April 1st at 9 weeks. I've had some discomfort in my uterine area. An ultrasound last week was clear, so there's nothing leftover. However, I've since had a good bit of lower back cramping and constant pressure in my uterus. The cramping is very intermittent, I feel like I'm going to get my period, but don't Is this 'normal'? I don't think I even know what 'normal' feels like anymore, but I shouldn't be feeling uterine pressure just sitting here on the computer, right? Any suggestions?