I flush my port every month on the same date, it is checked off on my calendar. My doc recommends every month, month and a half it should be flushed per protocol with saline and then heparin. I access it myself, it was wierd to do it myself at first (odd to say because while I was working as a RN, I accessed many ports) to get the angle of the needle just right etc....
I have only had one incident with my port clotting, even with monthly flushes. That was fixed with alteplase, haven't had any problems since.
I will say that there was one time that it wasn't flushed for 2 months, due to confusion of hospitalization etc..kind of like your story. It was a very new port at the time and there were'nt any problems with my flush. I too was anxious that it was clotted off and that I would need a new port.
I know that many have gone longer than a month, but boy, I don't want to take any chances!
Hugs, Jenn <img src="i/expressions/face-icon-small-smile.gif" border="0">