This is such a timely topic, because I am awaiting my latest FISH/PCR results as well. I used to drive myself into a total panic! Over the first year of treatment, I was looking for signs of progression leading up to each round of bloodwork, and my mind was expecting the sky to fall on top of me - I know exactly how you feel right now!
Other experts on the board will chime in, but I'll start with some advice from my own journey after 3-1/2 years on Gleevec 400mg:
1. First off, take a deeeeep breath and RELAX. What you are feeling are likely the symptoms of anxiety, and not Gleevec side effects and not CML progression. I go through the very same situation about 2 weeks before my blood draw, and then it gets worse while I wait the one-week+ for the results to come back. It's taken me time to learn how to control my own anxiety, but even after 3+ years, it's still tough. One of my symptoms at diagnosis was a "whoosh, whoosh" sound in my head/ears from the thick, WBC-laden blood. And how interesting is it that I get that same sound in my ears a couple of weeks before every round of bloodwork, then it goes away after I get the results and see that everything's okay.
2. Find something to get your mind off of it, even if it's temporary. Exercise is what works for me - I go for a bike ride, a swim, a run, a brisk walk, or something to calm myself down. If you are physically able to exercise, try it and see how much it calms you down (both during and after your workout). I would get these crazy pains like you're describing, think that I'm progressing/dying, but then I'd lace up the shoes and go for a one-hour run, and wouldn't you know ... the pains would completely vanish. But then they'd return as my mind started thinking worst case again. Crazy, isn't it? Also, moderate exercise gets your heart pumping, controls fatigue, and releases chemicals in your brain that will calm you down. It absolutely works for me.
3. It's okay to consider some short-term, low-dose medication to help control anxiety at testing milestones, just to get you through these periods. Check with your oncologist about this. I had to do that for the first 18 months, and it helped me out a lot. Wellness therapy is a better option that doesn't involve medication; most cancer centers provide wellness doctors that can help. I had a one-time wellness appointment at the facility where I'm treated, and it helped me out immensely. It helped get my mind in the right place.
3. You reached CCyR within a year of diagnosis, and your 9-month PCR showed you on the edge of reaching MMR, which is another significant treatment milestone. This is a very good response to Gleevec (pretty close to what my response was after 9 months), and there's no reason not to expect a good result at the one-year point.
4. If your doc is close by (mine is a 30 minute drive from my home), then heck -- call and ask to come in for a CBC. Most facilities can get CBC results in 15 - 30 minutes, so you can get a blood draw, wait, and get the results. I did that one time in my first year of treatment; I was in a panic, called, and they happily let me come in and get a quick CBC - and of course, everything looked fine. Then I went in a couple of weeks later to get my full round of bloodwork (CBC/FISH/PCR). The first year is tough on all of us mentally and emotionally, so it's not an unreasonable request.
I hope this helps a little bit ... hang in there!