Paula, it is good to hear that you are getting your strength and stamina back and riding a bit!
I didn't post here initially because my diagnosis was "just" malignant melanoma. I had a freckle on my upper arm that increased in diameter very slowly over a period of about 10 years. My old doctor didn't think it was anything to worry about, but my new doc here in Oregon thought a biopsy was prudent. Luckily, the melanoma had not yet spread, although it was over 1 mm deep into the skin, which was a concern. I didn't require any chemo, but did require surgery and a sentinel node study back in late August 2013.
I was back on the DR in late September and felt pretty good until we rode some dirt roads in So. Utah. I had a couple of stupid mishaps on the dirt and realized that I was weak, deconditioned and fatigued. I was reluctant to ride because I was sore at the surgical sites and just didn't feel "right." In October, we took off for three weeks on the RT's. I was able to push myself a bit and felt good to be on the bike, but I was pretty tired at the end of the day. In retrospect, I am amazed to see how my strength and stamina has improved over the last few months. I didn't realize I was sick, but I did know that I didn't feel very good.