Within 2 months of being diagnosed and treated, i rather felt like death. Couldn't do much, was very sensitive.
One month in to tki treatment i wouldn't expect to feel great. I'm not a doc but if i was you I'd be asking for a lower dose imatanib, monitoring blood weekly to ensure the counts are ok and sticking with it for 2 months before making decisions.
While your body adapts, stay away from alcohol (because you've shown sensitivity) and drink 3l water per day and see if that helps. Take time to listen to your body, which tki did you feel less bad on? Try that one for longer.
I had a sub optimal result at 3 months, got switched to tasigna but never felt i needed that switch. Was switched back to imatanib (for a non side effect reason) and got to complete MMR in record time (10 months).
Docs have the experience and expertise but only you live in your body, all day , every day