You really don't connect with that oncologist do you? From my experience a number of people attracted to that profession are somewhere on the 'spectrum' and can be a little lacking in empathy. Good scientists, but less than stellar when it comes to dealing with people. I guess it comes down to whether you feel you can trust them. Presumably they wouldn't be sending you off like a ticking bomb if some other action was appropriate; its their reputation at stake as well and they seem to take THAT quite seriously.
If you genuinely don't trust them they need to go. The whole business is stressful enough without not feeling you can rely on your health team. I've sacked oncologists for being rude and disinterested. It can be a pain in the arse if you live in the country--Ive just done a 260 km round trip today to see the people managing my current treatment. I consider that a better option than bitch slapping the self important look off the face of their predecessors. Up to you.
Variable tumour markers are not uncommon, which has made me wonder whether the test is worth the stress.
Hope tomorrow is a better day, Cate. Marg