There's absolutely nothing to worry about when it comes to Barcelona because the team is a top one and associates with fierce energy. Barcelona in good shape despite poor standings below Girona, we know the specified teams that would actually reached significant positions on La Liga table this season and Girona might not be among, starting the league with spectacular energy, it doesn't guarantee they will end up in the top four. Girona lacks consistency to continue their brilliant performance, directly means they have slim probability to survive.
Are you sure we don't need to worry about Barcelona? Have you counted how many Barcelona players got injured? There are 6 Barcelona players who got injured, it means they are not in a good condition now. Sadly, those 6 players are mostly the key players for Barcelona squad. If they often get injured, it may ruin their performance. Those players will be difficult to maintain their good performance due to injured problem.
Anyway, I think you too underestimate Girona. They played quite consistent so far, they started this season perfectly. Although they got 1 defeat, it doesn't mean they probably easier got more losses. In reality, they still can maintain good performance.
Barcelona are in good shape,they aren't doing badly at the moment,but they just need to be consistent in their game play,they are aware of the fact that Madrid won't let them win the Tittle again this season,and therefore,they need to belt up and try to do well,else,smaller teams will take advantage of their state.
And for the injury crisis befalling them,yes,injury is part of the game,but the ability of the coach to improvise when injury hits his players and still grind out a better result is what makes that coach a better coach.Barcelona will still do well this season and definitely qualify for the Champions League again,but winning the league will be impossible.