Well, it sounds like when it rains it pours, to say the least! Three combat tours?! So, you you're amazing first of all. Sorry to be judgmental there. Anyone who survives that deserves more than my respect.
As for those pesky opiates and patches. ONLY speaking from experience, careful in the shower...I found out the hard way that if they are on in the shower, the heat from the water, can cause them to release the medication at a different often quicker rate than expected. So, just a heads up. I have a spinal disorder, so just wanted you to know.
Also, gallbladder surgery here too. Don't know if mine led to an infection yet, because we are still waiting on the blood cultures.
My main point is to be here to support you, and welcome you to this site and the forums. There are a lot of awesome people here. We are all going through something. It sounds like no matter where you are on the battlefield, you've got a squad here that has the light on for you. I can't imagine how awful or painful your conditions are to deal with all at one time, but please keep holding on! People living through hell give one another hope, and sometimes that is all we have. You know how it goes in uniform (sorry I don't know your rank), we don't have permission to quit do we. lol.
You ARE a decent and good person, life just makes no sense sometimes. Cheers to you even if you are going through anger and frustration! HUGS!!