I am really sorry to hear that things are rough. Have you been back to the surgeon to discuss the problems you're having? Scar tissue is a big problem for a lot of people. I feel like I've been lucky, but you never know how your body will react. Do you drink enough fluids? Low bp, headaches, weakness and dizziness can be signs of dehydration. How about
vitamin levels? Are you taking anything vitamins or having your blood checked? You should get some basic bloodwork, but always chew food well, stay hydrated, and go see the a surgeon to see what the options are. Maybe you can take something for the nausea, or maybe there's something for the gas, perhaps there is something going on that you can see and treat. You should talk to someone if you're depressed and anxious too. Having to give up your job and independence is shocking, but you will get back on your feet. Think positive. Life is a series of ups and downs. It will be up again