Feeling Emotions when Have Physical Issues

I’m working on this month’s work, and finding it challenging to distinguish feelings in my body that are related to emotions, vs. the (physical) chronic stomach pains / discomfort I have. For example, I noticed that some emotions create different sensations in the body, often in the “stomach area” (i.e. below the heart but above genitals). But that’s also where I experience discomfort from my Lyme disease, period cramps, etc. How do I work to differentiate these?