"Despite my partner's perception of me as a hypochondriac due to annual blood work anxiety ..."

This upsets me. Your partner really needs to get on board. I learned a new word a few days ago, "scanxiety" -- the anxiety that people with pancreatic cancer feel as they gear up for the every-3-mos. scan that will tell them whether the cancer has returned. (I'm not there yet but will be.)

They are, QUITE NATURALLY, freaked out because it's a stealth cancer that creates few or no side effects (so we have to rely on scans and blood tests to know whether it has recurred, and even those can be misleading), bc it's a super-aggressive cancer that can do a lot of damage in that 3-mo. spell between scans, **and** bc it has a low survival rate.

I can only repeat: Your partner needs to get on board and start being sympathetic to your completely understandable / completely logical distress.

Also, I'm wondering whether you've ever looked into EMDR, a therapy that works to reduce intense reactions to old traumas.

I wish you well.