Fulham's 1-0 win at Portsmouth rendered the Royals' 4-0 success at Derby insignificant as they were condemned to the Coca-Cola Championship along with County and Birmingham.
"I have got to look at things," Coppell said. "It's too close (after the game) now. I have a huge affection for this club and I want to do what I think is right for this club."
Fulham's superior goal difference proved to be the decisive factor after both sides finished the season with 36 points - 25 clear of the rock-bottom Rams.
"I thought if we had got three points here it would be enough," Coppell said.
"At the end of it all, you have to give huge respect to Roy (Hodgson) and Fulham. We wouldn't have been looking forward to going to Portsmouth.
"I don't know how they have played but, whatever, Fulham had to go there and get a result and that was to their credit.
"The run they have had has been brilliant. Obviously, to say we are bitterly disappointed is a huge understatement," he added.
"The dressing room is a very sad place at the moment and it's difficult to know what to say to ease their pain.
"I'm lost for words, there is no comfort in words at the moment. It is a bit of a numb feeling. We have brought some good stuff to the Premier League so it is a shame for it to end that way."