I have PA and have been SI for over a year now, religiously sticking to a once/week schedule. Slept 10+ hours last night but it was a struggle just to get off the couch today. I couldn't figure out what was wrong and suspected I was getting sick. Then I realized I forgot my weekly injection, which was due 2 days ago. Just a reminder that PA is for life! On the one hand, it's too bad we have to deal with this forever, but on the other, thank goodness there's an easy solution.
As a side note, I had to self-diagnose and self-treat, so please, take your health into your own hands. You know your body best!