Dilemma about ultrasound

Last week I went in to the emergency room due to cramps and pressure, I thought I was measuring almost 8 weeks at the time. They did an ultrasound but only saw a gestational sac and a yolk sac, my HCG levels were 18,141. I scheduled myself to have an ultrasound tomorrow way before my trip to the ER, my dilemma is if I should go to this ultrasound what would be the odds of seeing or hearing something? I’ve been stressing out so much and I feel that if I go I might get answers but also if I go what if I don’t get the answers I was looking for? I have a follow up appointment scheduled for next Monday with blood work and an ultrasound. The baby father and I are discussing what I should do, he told me to wait until Monday, but the wait alone is stressing me out to the point I can barely sleep. Regardless I have an ultrasound this week and next week. Should I cancel my ultrasound for tomorrow or should I go? I want to listen to him, but he’s put me on enough of a roller coaster ride since I told him I was pregnant.