Cmml

I have recently been diagnosed with CMML it came as a massive shock as I've always felt quite healthy , the only thing I've ever had was appendicitis, it was only found during a blood test , I find myself waking in the middle of the night wondering how is this going to affect my life, although I'm 71 years old I am quite active and enjoy gardening, walking, and I'm wondering if this is going to shorten my life , its worrying me more that I would like to admit