You have already got a lot of wonderful advice. Sleeping is the prime factor here, and heat would be a close second, which some people have already stated. third would be distraction, usually video games or books would help, but judging from your original post, I doubt very much that would help in this situation, so we will throw Distractions out the window. Have a long bath (not shower, it is too interactive, thus your mind is not given enough time to relax). As for with your friend, i suggest give her time and do not worry over it, but at a later date do ask her what was wrong at the time, it may not have been even you, maybe she is feeling family pain as well. I am also very sorry to hear of your Uncle, very recently my grandmother passed away (god rest her soul), and it was a troubling experience; spend time with him in the mean-time, you may already be doing this as I type, but it can't hurt to reinforce it.
Overall, since you can't use distractions, try to be as non-interactive as possible. Try to sleep, relax, herbal, whatever it is that you find is utterly relaxing, and no showers, just baths. Hope this helps.
