Manager Steve Evans labelled the 2-1 victory over Fleetwood as Rotherham's hardest fought of the season.
Leading marksman Daniel Nardiello set Rotherham on the road to victory with a goal inside three minutes - his 20th of the season - but David Bell equalised two minutes later.
Kieran Agard then slammed home the winner from close range in the 62nd minute.
"We know what we have to do - win our last three games," said Evans. "That makes Tuesday's visit to Bradford a massive game. We can't affect what Port Vale and Cheltenham and the others do, but Tuesday's game has everything and Bradford have some unbelievable players, and I said early in the season they were a title threat.
"We know if we win on Tuesday we go third and two or three of the results today have gone for us. In terms of everything we are playing our best football of the season and in the last couple of games the players have shown they have got some steel and some fight.
"We now have two away games, but our only focus at the moment is Bradford but that has been a battle against a good team with a good manager."
Fleetwood boss Graham Alexander agreed it was a hard-fought contest.
"I think the lads gave everything they could," he said. "They lacked a bit of game management and decision making at times, and the first goal was a bit of a killer for us.
"But the lads came back after that and responded well after the early set back and we got back into the game with a good goal.
"We then took the game to Rotherham, especially in the first half and put them under a lot of pressure, but when you come into a hostile environment like this sometimes things go against you. We finished the game strongly and the lads were still looking for a win."