Need to figure out how to have my port flushed on the road

While experiencing an open time period in treatment of ovarian cancer, we are leaving Florida for six months. However, I have a port embedded in my chest that should be flushed out once a month. Trying to make arrangements for this, we have discovered we will need a doctor's appointment for the state followed by medicare and insurance verification and then an appointment for the flush. Initial discussion in San Antonio revealed it would take longer than the week we plan to spend in San Antonio to accomplish this.

Has anyone else had this problem and come up with a solution? Will just walking into an emergency room work?

I appreciate any suggestions....