It didn’t occur to me that I have to light extra from now on (it wasn’t “shogeg”), but now I am wondering if I do.
That’s not even close to being in prison (Mishnah Berurah’s case) or being busy with a sick child (SS”K’s case), so I would say yes, you should add.
There are other factors, though, (such as that there was light where you ate), so definitely ask a shailah.