Hello everyone! Yesterday at 4 pm I started bleeding, my due date was …

Hello everyone! Yesterday at 4 pm I started bleeding, my due date was 8 weeks, I went to the hospital but there wasn't a doctor on duty, they admitted me, the doctor arrived at 9 am and checked me, but the bleeding stopped, there were brown discharge, very light like diluted with water, the doctor examined me and said that the uterus is at 7 weeks. I stayed overnight in the hospital, today my husband took me home. Tomorrow I'm going for an ultrasound, should I have an ultrasound on an empty stomach or is there no difference? Or is it better to eat something before the ultrasound because I lost 4 kg in two weeks due to morning sickness, I haven't eaten much