Hello, should I worry?

Bryanna

I'm 6 weeks pregnant and yesterday I was having some cramping and last week light brown spotting ( not enough to wear a pad.)Went to er and had a ultrasound baby measuring at 6weeks, hr 115, and baby in uterus. My question is that my nausea has lightened, I'm still slightly fatigued, nausea comes on if I have an empty stomach, also still have some food aversions and super smell. Should I be worried about that?