5 Pages in.. and no idea what I read.

So, I get in seasons where I read a fair amount and seasons where I hardly read at all. When I begin reading again, I always find that during my reading sessions (anytime I pick up a book to read several pages) I miss nearly everything in the first 5 pages. I cannot get my mind to stop going through events of the day, events coming up, family, work, etc.. However, once I get past those 5 or so pages (it may vary a page or two), I'm invested and focused.

A simple solution is to go back and re-read the first 5 (or so) pages from where I started, so I'm not looking for a solution. I'm just curious if anyone has this issue?