The on-loan QPR midfielder also hailed the side's character to come back from two goals down and draw the game 2-2 at the County Ground.
"To get a goal that late made it feel almost like a win for us," he smiled. "It's testament to our character and how far we've come as a group. There are some negatives we need to work on but we need to keep that feel-good factor going at the club.
"They counter-attacked really well which made it an end-to-end game. I think our character and fitness levels pushed us over the line today and that's something that will be key for us over the next few games."
He added: "(Millwall) were a barometer for where we're at. We had to throw different things at them and in the first half they stifled us. We got more joy in the second half but on the balance of play we deserved at least a point."