Are you saying you two had sex on the 9th, or her
cycle was due on the 9th. There's a few things that would make pregnancy difficult in this situation, the first being that 5 days before a female's cycle she's generally not fertile as well as she would have a very short luteal phase. Most women need one of at least 10+ days.
As for seeing anything, no you wouldn't. It's far too early. Typically nothing is seen on an ultrasound until a female is 5-6 weeks pregnant.