All relationships have their hard times. My mum ended up with breast cancer a few years back. My step-dad didn't feel that his "needs" were being met either and turned to porn. (They're vanilla and my mum is against porn. He knew that).
Anyways, back to my point, he was busy looking at porn while she was busy going to chemo, losing her hair, etc.
They finalized their divorce last month.
I agree with Sadie, that it is selfish to ignore your own partners needs in the midst of -their- health/financial/whatever crisis. At the same time I do understand what it feels like to be a sub without her master/SO performing as such. (I date vanilla so it's common for me.) My advice would be to hang in there- is this brief period really worth throwing it all away? "This too shall pass" ... and what not.
He probably isn't ignoring you- instead he's focusing on his own basic needs right now- the need for health and wellness. Don't neglect your emotional well being either. I'm not going to suggest just sucking it up when it comes to depression. Your best bet- Seek out good friends who you can confide in. Go out with them for coffee, head to a movie. Give yourself a break and get your mind off of it. Then when you come home focus on what you DO have with your partner instead. Take a bath together and just enjoy the company. Light some candles and lay in bed with him. If you still feel ignored, after all of this is done, then the best thing you can do is communicate. Think about what you want to say beforehand and think about what he might be feeling as well. Then talk to him.
And, If you just need an ear, I'm always available via PM. I don't mind listening.