HPSP

Are there any nurses here familiar with the HPSP monitoring program in MN? I am a nurse that failed a drug test at work (tested positive for THC) and have been on monitoring since as I was encouraged to turn myself in. I ended up quitting my job because I was basically told I would be fired. I have a new job that I love, luckily I have not had any stipulations on my license, and thus far all my tests have been clean. I am on a 3 year program. I average 3 UA's a month. As time goes on, do I get fewer tests? Do they ever do hair or blood in MN? Are you done after 3 years or do you have an exiting program like some other states? I feel so out of the loop. My case manager is tight lipped and often no help. What happens if you have a positive (I've heard a lot about false positives for etg but thankfully have not had any thus far)? Has anybody been through the MN program that can help answer questions?