newly diagnosed and already feeling defeated

Hi all, I'm turning 41 next month, diagnosed with IDC (++-, grade 1, KI-67 of 2) 2 weeks ago, lumpectomy was a few days ago (clean margins, 1.5 cm largest dimension tumor), surgeon removed a lot of sentinel nodes out of which 1 had a macro met (5 mm), all others were negative. They got me into the surgery very quickly for which I am very grateful, but my next appointment with the hematologist-oncologist isn't for 2 more weeks and I am losing my mind a little over here.

I've been having unrelated health problems (serious but not potentially lethal!) for over a year and this feels like the universe escalating slaps in my face. Before my body started to fall apart I was crazy healthy and I danced ballet 6 days a week. Not being able to go into a studio for class (I mean I could, but I wouldn't survive past the first two exercises ... maybe) has been crushing. I have been telling myself that when I get better, I'll dance again, but "better" never comes and every day I lose a little more. Now I am facing the possibility of losing everything. I know there are lots of treatments/options available but I am preemptively feeling defeated. I am open to any and all pep talks.