Nothing wrong with a little healthy hypochondria.
I’m no expert but the subtle but important point is that your results are referring, I presume, to healthy immunoglobulins whereas in this condition (MGUS/myeloma) the immunoglobulins being produced are clonal or faulty, and the risk is that their proliferation will harm other organs and people’s immune responses.
From the conditions you mention I assume that they were looking for evidence that your immune system was under stress, whether those figures you mention show this, I cannot say. Presumably as nothing happened, in the famous medical expression designed to annoy any patient, they considered that they were ‘unremarkable’.
I’m not dismissing your concerns or your illness, as all of us experiences that. I simply hope I am leading you in the right direction. It’s very easy to lack a full understanding of blood results even for experts.
As regards abdominal/bowel problems my own belief is that they won’t consider surgery unless they have clear evidence from tests or imaging what and where the problem is because it’s so easy to do more harm than good without a clear goal. In other words they won’t go on a hunt for the problem through surgery unless your life is at risk. Creating scar tissue inside the abdomen can cause problems worse than the original problem and I have personal experience of this.