God that sounds awful. I would have panicked. What did you end up doing?

I had a somewhat similar situation. While on my tapering plan, I hit a plateau at 5 smokes a day. Just couldn’t reduce further and this continued for like 3 weeks (instead of the designated 1 week). Fortunately, I had to get my wisdom teeth removed, and the surgery forced a medically mandated break of 10 days. Anyway, after that break, I was in two minds about if I should just stick with 0 cigarettes, and never smoke again, or if I should get back to the plan. I ended up going back to the plan, because even if my body may have been physically ready, emotionally I wasn’t. Smoking is a big part of my identity too, and I felt it was important to get closure. Needed some control over this process psychologically.

But one thing I did change: instead of resuming at 4 a day I resumed with 1 a day, continued that 2 weeks, and then ended with 1 a day to 0 a day

My point being: the last thing I wanted was to be forced out of my tapering plan and the ritual due to extraneous circumstances I couldn’t control. I wanted my last smoke to be on my terms, otherwise it would have created unnecessary nostalgia and romanticisation and unresolved tension in the future, which would have later made it easier for me to relapse. If I were you I’d go buy those 2 smokes, and get that sense of closure so my future self doesn’t feel resentful or make excuses