Hi @hope2013
I think that you are wise to take any testing that is offered, regardless of your reluctance to go through the pelvic exam. Make sure that who ever is conducting the exam is aware of your circumstances, ask your onc or GP if they will prescribe a sedative if you are really freaking out and keep reminding yourself it is only one day in your life and it could make a huge difference for both your mental and physical health in the future.
The advice on the Onco-gyn is well worth discussing with your current team. The other thing to consider, even though you have more than enough on your plate, is how you feel about your current oncologist. I'm a difficult old bat and it doesn't take much for me to decide I've lost confidence in someone--and that may have nothing to do with their competence, just the quality of my relationship with them. Trust is critical even though I am more than aware that this sneaky mongrel of a disease is monstrously unpredictable and medical teams are pretty dedicated to keeping on top of it. If you haven't already done so, maybe think about seeing a counselor. Sometimes they are helpful; sometimes not so much so. You have a lot to process and you may find the support useful.
I've also had a recurrence (though thankfully just the one) and I can't imagine how it must feel to be so young and to have to be back on the BC train for a third time. It is bad enough the first time. Don't stress too much about the chemo. If you need it, you need it. It passes. Mxx