Only 5 weeks and completely stressed

I started having cramping around 4 weeks, it hasn’t lightened up and sometimes it’s sharp. Mostly it’s dull, no bleeding and just beyond worried something wrong will happen.. at 4 weeks the ultrasound showed nothing, no pregnancy at all.

They want me to come in for an ultrasound, but I’m only 5 weeks and feel scared to see nothing again as it’s so early and still may not. It’s all a wait and see game and I have no patience, especially when I’m scared.

Any advice? Anyone go through this? My doctor and nurses haven’t assured me cramping is normal, they haven’t really assured me of anything..