Can I get an ultrasound?

On monday I will be 4.1weeks. 
My fiance is getting deployed monday. We do not have a doctor. The hospital said without an advanced appt. they wont do one. 
Are there any places to walk in and get one? I do not want him to leave without one because we have had multiple miscarriages and he has never seen our baby on an ultrasound die to him always working. 
My two questions are: Can I get one last notice? And Is it too early? Will I see anything? Is it even noticable by a doctor to see the baby?