Welcome to HCM
We understand your concerns
I went through your description. Such bruised feeling do happen when there is acidity and it could last longer than popular expectation. You should feel acidity as well as constipation
along with this.
But this should not cause weight loss
. For weight loss, you should analyse yourself and confirm your new habits are not the reason. Sometimes tape worm or some other parasites might cause the pain as well as weight loss.
To confirm you should visit a general physician first and he shall advice further course of action.
Hope this clears your doubts. Available for further clarifications.