I wouldn't worry about a thing. You're
protected, and when the placebo days come,
you can either wait one extra day and
start up again on your normal day, or just
shift the whole schedule forward and start
a day sooner

one extra day off
the pills shouldn't be dangrous.
Also! I have an xtra pack that lays
around, and when I drop or lose a pill, I
go to this extra pack and pop out the
specific missing pill! That way, I don't
miss one!