SPD and Pain

I am just starting to realize ALL the ways my SPD has affected my life. I am wondering if it can have a physical pain manifestation as well, however. Does anyone else have an issue with that? I have yet to see that addressed in all of these forums. Whenever I am upset by the bright lights or in total discomfort with the tightness of my pants around my waist or the taste in my mouth or whatever, I get a stomachache or a slight headache. I haven't heard anyone else mention that, and I am wondering if, even though I TOTALLY know I have SPD after reading how many of these symptoms are congruent with my own, if I also simultaneously have another issue going on. It could be an anxiety issue, caused by the extreme discomfort of the situation, but I am very curious to know if any one else is dealing with this as well.

I should also mention that I have Bipolar Disorder and Celiac Disease as well as a few other nice health issues going on. I have been managing these issues pretty well for quite a few years, but my SPD has been getting worse in the past year and a half, and that is why I did some digging to find out what in the world is going on with me and found this information and feel so much better. Previously I had read Elaine Aron's work on HSPs, so this totally makes sense. :) Any help any one can give would certainly be helpful.