Good to know. What do I do? Toss a smoke bomb or a hand grenade? I have a 9mm that would shoot faster but I think that I might be more accurate with the shotgun.
You're definitely going to be more accurate with a longarm. (The only exception might be crosseye dominant who cant pickup weakhanded shooting).
Just shoot it some at the range at across your bedroom or down the hall distances and become familiar with how much you have to aim/point and know how small the spread is at that range.
One other thing, those fiber optic front sights are fantastic. They don't cost much. There are versions that will sit on top of a ventilated rib or different versions that will screw into where your bead used to be.
Understand I'm not talking the shotgun down I just want you to do your best to minimize the downsides.
The shotgun takes more skill to use effectively than any other gun and even somewhat seasomed shooter tend to cause malfunctions under stress (shortstroking mostly). Reloading is slow and somewhat difficult. Even those who can reload quicker with all these fancy methods, are unlikely to be able to do so when adrenaline makes your hands feel like mittens.
HOWEVER, the pump shotgun is very cost efffective and supremely multi functional.
Moreover, if you gave me ONLY one round of 9 mm 45, 223, 308, or 12g and a gun for it, Id take 12 (at least inside a house) without hesitation.