It all depends on how often they continue to lose points, Real and Atletico have beaten them this round, and they still have a game in hand, and Athletic Bilbao are two points away, so even that's not the limit and they can go even lower. They look good in the game, even in the match against Atletico they controlled the whole game, but a few mistakes led to their defeat and this is not an isolated incident, the same thing happened against Leganes and Las Palmas, and this is too often.
The bad part is that Barcelona played one more game, not like they are in equal game count neither. So Barcelona is trailing Real Madrid 2 points, and Atletico Madrid 3 points, but Barcelona also played one more game, meaning the game could become 5 and 6 points as well. So recovering from that is not easy, even if you beat them next time you meet them, they don't close up the game and that's the most important part.
I can see why that would be an issue and that is why I think Barcelona will be in trouble, not seeing how they could win. It's such a well deserved bad season though, all as a revenge of Xavi for me. Xavi himself wanted to resign last year, they begged him to stay on, and then fired him instead, and he won the league one season and became second another season and they thought it was a bad result so they fired him, like anyone could have won two in a row, and they hired Flick instead, like that was a much better move, so instead, they are going to possibly finish third.