Hey Lol,
Terribly sorry to hear about your situation. I for one am not really capable of complete rest unless I have the flu! Haha. So good luck with that. You sound like me in that even when you know better, you still push yourself.
My forearm is OK, I don't think I have ever had a problem with it so far. What was bothering me before was in my upper arm somewhere just above the elbow under the bicep. It seems to have gotten better, but we will find out over the next few weeks.
Right now, I am still in shock at how much strength I lost after the PSMF diet and not working out for a few weeks. I am getting back into tennis and was planning to take a lesson once a week, but I found a tennis school that has a cool program where you can attend as many lessons as you want for the first two months, so I will take advantage of that and go at least 5 times a week. So I don't think I will getting into Crossfit just yet and I also am having a little trouble figuring out how (when) to train and do this tennis thing at the same time. But I got new shoes, new Babolat racket like Nadal, and other little things, and I am ready to give this thing a serious go. Want to get into leagues and stuff as soon as possible.
By the way, I also wanted a Concept2 but they are too expensive here. I ended up getting a Tunturi, which is also highly rated and much cheaper, at least here in Japan. Anyway, that was over 2 years ago.