Dear Nix,
I'm so sorry to hear that you most likely have cancer. Don't panic too much until you have all of the details.
Partners vary heaps with their responses. Hopefully she comes around to being more supportive, and even goes to the Dr's when you get results. Stay strong, seek support anywhere you can.
It doesn't help you but my husband has been excellent. But we've been married 43 yrs(teenage bride) and still get along very well.
I hope that your results are better than you may expect.
Let us know how you go, lots of advice here.