It is ok, just waiting for the last appointment. With health insurance and work permit, we do not have any anxiety no? So be patient, the process will be closed soon. Enjoy everyday life and good luck.congrats! we are April 2016 applicant too and we got that same AIP letter 4 months ago (except we already had medical approved and didn't need anything more) and since then nothing at all, so the wait continues.....
hoping for some luck for both of us, it seems like we are in the "forgotten" months
keeping fingers crossed that this won't drag into 2018 and beyond ........