I finally caught up on the missed sleep that had turned Friday into a stumbling disaster by sleeping through most of Saturday.
But I couldn't work out why I felt so feverish when I finally woke up Saturday evening, I'd thought my cold was long past that stage and my whole head just felt unpleasantly warm.
I didn't realise what was actually going on until the wee small hours of Sunday morning, at which point I promptly face-palmed myself.
I was supposed to have changed my butrans patch on Friday. I'd just spent 12 hours in opiate withdrawal because I was too stupid to realise I was in opiate withdrawal.
Fortunately it was easily enough fixed once I'd had a new patch on for a few hours, but I really hope this coming week is better than the last one!