What Causes Excess Fatigue And Stomach Discomfort?

I have had the essure placements and had them and my tubes along with the essure removed in jauary of this year went to post op appointment was told I have endrimetriosis and now two months later I feel sick to my stomach and weak and sleepy all the time. I havent been feeling like tgis since I was pregnant with my son but I know its physically impossible to be pregnant cause I have no tubes anymore. I testedmy sugar at my parents with my grandmas test meter my sugars 79 and I havent been eating bad at all I dont knowif this is the endometriosis or not