The LaLia giants have a huge mountain to climb if they are to reach the last four of the competition and defend their title after being stunned 3-0 at The Emirates last week, in what was an incredible night for the Gunners and two-goal hero Declan Rice in particular.
As a result of their superb display in north London, Mikel Arteta's men are now the big favourites to reach the last four of the competition for the first time since the 2008/09 season, where they play either PSG or Aston Villa.
Real Madrid, however, have history when it comes to pulling off Champions League comebacks, having done so against the likes of Manchester City, Bayern Munich and Atletico Madrid in the past - and Bellingham claims the current squad are in the mood to make that happen again in a warning to Arsenal.
Speaking on Tuesday about Real's reaction to the first-leg loss, the England midfielder told reporters: "To be fair, after the game it's normally really tough. You have the few moments after you've got to do the press where you're sitting around on your own where you do think it's probably, 'it's going to be difficult, it's going to be tough'.
"Then the more you get speaking to the other lads and see how confident they are, the more it kind of rubs off on you. The lads who have experienced these kind of nights before, it rubs off.
"Like I said before, it's infectious. It makes you a lot more confident, a lot more comfortable with the situation you're in, about the people you're going into the situation in. For us, it was pretty much immediate. By the time we were back on the coach we were all, not in good spirits, obviously, but realised we could still be in the competition.
"I think what makes us confident is the quality we have, the history of the club, the fans who will turn up and give everything on the night, the aura of the Bernabeu in these Champions League nights, that's always something.
"I think we still felt like even though we played as we possibly could in a game like that, we still had chances, weirdly, and still had moments where we felt we could've capitalised a bit more.
"Normally when you have your worst games you feel like you're absolutely miles off it and there's no way you can get in the game. And still we had a few chances where it felt like maybe if we just increased our level and were a little bit more attentive to the few things they did really well, we can be in it.
"We're not stupid, but also we're confident in the ability we have."
Two superb Rice free-kicks, plus an excellent finish from Mikel Merino, stunned Madrid at the Emirates Stadium last week and Bellingham is adamant that his side are now fully aware of the threat Arsenal pose.
Asked if he was surprised by Arsenal, Bellingham replied: "Not really, no.
"We know the quality they had. I think the free-kicks were surprising, I've not seen Dec do that before, to be fair. I knew he could take set-pieces really well, the corners, but I'd never seen him do that with the free-kicks, so fair play to him.
"That was probably the only thing though, really. We know they're a really good team, we knew they have a really good manager, they're going to be organised and there was a lot of things that were really impressive for them.
"But nothing we didn't expect, they're a top-level team."