I Am Having Digestive Issues, I Once Weighed 164, I

I am having digestive issues, I once weighed 164, I now weigh 125, and continuing to lose weight, my appetite is not what it use to be, I an having diarrhea, nausea, stomach discomfort, it comes and goes, I have had issues with my stomach in the pass, an hiatus hernia, ulcer, acid reflux, I started noticing the weight lose around October, what is the issue, I'm at a lost