Unabsorbed pill?

Hello everyone, first time birth control user so it may be an obvious question, but basically I took my pill (POP, Slynd) and had slight diarrhea almost immediately. Now I'm not planning on being sexually active over the next month, so I'm not super worried about losing immediate protection if this counts as a "missed" pill, but I am worried that it may cause side effects? Like I started it on the first day of my periods and so far haven't had any had side effects or spotting after around 7-8 days.

So if I DON'T take an extra pill to make up for the possibly unabsorbed pill, will it cause any bad side-effects (not worried about losing protection for right now)? Alternatively if I take another pill just in case, could it cause any side effects?

Additionally if I take an extra pill now it would mean my placebo is starting on day 24 instead of 25 since I'm one pill short on my pack! Couldn't that also increase chances of abnormal bleeding?

Any advice would be appreciated! Mainly worried about abnormal bleeding due to the cycle getting messed up