letting yourself sit one (or several) out

Warning: This post became a lot more stream-of-consciousness rambling than carefully planned article. Sorry.

So, I've been missing a lot of class, recently. Annoying, but what can you do when you repeatedly injure yourself and then somehow manage to have two cats come down with emergency medical problems within days of each other? There is simply nothing for it, I'm afraid.
I always feel bad about missing class.
In a lot of cases I enjoy taking class on an otherwise stressful day because it's therapeutic. I simply can NOT think about anything but class while I'm there. There is too much to focus on and too much to remember. On days like today, though, when I am full-out emotionally exhausted (emergency cat surgery yesterday that ended up being so complicated and so expensive that my vet actually took us aside to apologize to us in person. No, really.) and the classes on my schedule are the ones that are HARD CORE ass-kicking classes that carry a certain amount of emotional baggage of their own... yeah. Not happening. All I really want to do is sleep, eat too much, and snuggle on the couch with my husband and kitties. Possibly drink cocoa and read Scarlet Pimpernel novels, because that is the most intellectually stimulating thing I am currently capable of.
Sometimes I feel a bit cheated when I can't go to class. In a way I feel like I am dancing in defiance of and in anticipation of the day that I can no longer dance. I know it's a day that will eventually come. And when it does I will be devastated. So I feel a bit annoyed with circumstances (an with myself) when things don't work out the way they are supposed to.
Sometimes I just feel guilty. There is this person that sits in the back of your head and grumbles to you "maybe you just don't WANT IT enough" as if it was your inner personal trainer. And then you have to cock a figurative (or literal, I make a lot of faces when I talk to myself) eyebrow and ask that little bastard what s/he thinks "it" is and why it is so damned important to want it in the first place. Because no one can piss you off or make you feel worse than you can, right? Screw that little dude.
Sigh...