Can I ask to have an ultrasound?

I am pregnant for the fourth time...with no kids. I have had 3 heartbreaking miscarriages. I had an ultrasound at 7 weeks and I will be 9 weeks on thursday. Everything seems okay no bleeding ... well I had brown blood but it stopped a while ago... thats what got me scared... but im still worried to go and see a dead baby (missed miscarriage)... im half tempted to go to the er and complain of cramps so i can just get one to check on how its growing and the HB... but can i ask for another one soon? just to make sure hes growing alright?