[In another scenario, he might have asked her; as it stands, with the mood of their exchange and how poorly it went, he refrains. Carefully drawing back and taking her hands again, he summons back his smile. He tries his best to look assured and calm, though it's impossible to fully shake off his misgivings when she looks so worried, still. If she's worried, he needs to do better to give her less to worry about, right?]

You don't need to do anything. Do something relaxing, take the day off! I'll come back in time for dinner. For real, I promise. [Hesitating a moment, he adds more quietly,] And I'll tell you everything.