The Mexican does not know what the future holds, but claims to be feeling calm and confident.
The Mexican forward has spent the 2014/15 campaign on loan at La Liga giants Real Madrid, where he has struggled for game time, although he did enjoy a fine run of form towards the end of the season in both the Spanish top-flight and Champions League.
He has been liked with a number of clubs this summer, with United thought to be looking to sell him, although he admits that he does not know what the club are planning to do with him once his loan spell ends.
"Of course it's in my mind because it's my future," he said.
"I don't know where I am going to stay, if it’s one of those teams (United or Real) or another team. So right now I'm just enjoying my holidays."
The striker’s deal at the Bernabeu reportedly included an option to make the move permanent for a fee of €10million, around £7.3million, although they decided not to exercise that option earlier this season.
Manager Carlo Ancelotti also seemingly quashed any idea of a move happening when he remarked that the player was “non-negotiable”. However, Rafa Benitez replaced the Italian at the Bernabeu this week, reopening the possibility of a move.
Hernandez, though, insists he hasn’t spoken to the Spaniard, and has no reason to either.
"Ancelotti was my manager but Rafa is not," he added.
"He doesn't need to speak with me because I was on loan from United. But I am very calm because thankfully the last two months for me in Real Madrid were very good and I proved a lot of things. So that gave me a lot of self-confidence and security for my future.”