James Morrison's last-minute equaliser, coupled with a late winner for Queen's Park Rangers over Stoke, means the Trotters have to win their last game at Stoke next Sunday, and hope at least one other club slips up.
Coyle said: "There is no getting away from how disappointing it is to have drawn a game that to all intents and purposes we were well placed to win.
"We created some unbelievable chances and at 2-0 up we should have closed the game out and had the three points we craved. My disappointment is that we allowed that to slip away, and now we have to stand up and be counted.
"At one point we were 2-1 up and QPR were drawing and that's how quickly it can change. That's why we know through all this disappointment that it could change very quickly next week - but we just have to focus on going to Stoke and winning.
"In a bizarre way, it might be a good thing that we're focused and have to go and win the game, and not be settling for draws or anything else. We'll dust ourselves down, take our medicine and get on with it."