Talking with my meditation group definitely helped today. Several had been through similar situations and knowing that makes it easier. My group leader also suggested that I write things down and allow myself to feel whatever it is that I'm feeling and not try to suppress it.
And of course meditating will help to keep my mind clear and calm. This is not surprising advice because it is a meditation class, after all :)
One piece of advice made a lot of sense: that whatever I do, I have to live with it later, and I don't want to do anything that I couldn't live with. I know it seems like a logical statement but in this context it made a lot of sense. I'm not depressed, don't worry, and I won't do anything silly... except for spending too much money, like I did with the pattern over the weekend.
On a brighter note, I did run across something I thought was quite funny: yarnbombing. I guess it's like guerrilla knitting: find an object, knit something to cover it, and attach the knitted item to the object. I love it! What a way to make our cities more beautiful - and use up your yarn. :)