I second what Spanked said about seeing if legal counsel would help get you out of monitoring, and I'm also sorry that there ended up being 'more to the story'. It might be a silly question, but if you already have your contract, why do still need to go to a settlement conference? (Pardon if I'm being naive here).
Anyways, as many others have said who have gone through monitoring (or are are still going through monitoring) IT IS DOABLE. I endured 5 years of it and yes the inconvenience, stress and cost of it all sucked, but you can do it! I realize how unfair it is for you to have you do it in the first place (after 3+ years of sobriety already), but I have a feeling they might not be taking your clean time seriously because it "wasn't on their watch"...if you catch my drift. They're probably making you do monitoring to PROVE you truly are sober and not "just saying so", which isn't fair, but none of these programs are.
Hopefully legal counsel can help, but if not, just take a deep breath and take it one day at time. Make sure you know what you can & cannot take to try to avoid false positives....that's really all that you can do. Good luck & I'm rooting for you!