I have multiple diseases like type 2 diabetes, high blood pressure, high cholesterol, arthritis, fybromyalgia?

Hi, my name is (…), I am 50 years old. I have multiple diseases like type 2 diabetes, high blood pressure, high cholesterol, arthritis, fybromyalgia, excema, anxiety, depression, gerd, bone density and gastroporiesis. I take meds for everything. My question is about the gastroporiesis, my Dr has done multiple testings and all come out to be I’m constipated. I can be over 7 days without having a bowel movement. I end up taking all the meds the Dr has prescribed. linzess, amitiza, dolcolax, miralax, metamucil, lactulose and stool softeners. Nothing works and when it does i have diarrhea all day and painful. Please help, I don’t know what else to do.