Carrick has been restricted to only four games this season after he was diagnosed of an irregular heart rhythm earlier in the season, a condition which he said formed a major part in his decision to retire.
"When you go without that a little bit, it kind of hurts, you kind of miss it". It's something you've got to accept so that's where I am at. "I've been training hard and we'll see what happens for the rest of the season", said Carrick.
On the topic of joining Mourinho's staff he said: "It's kind of been sorted out, but we're still talking about it so there is nothing to totally confirm yet".
"I got back fit and I wanted to finish on my own terms really".
Carrick has won 18 trophies in 12 years at United, including five Premier League titles and the Champions League in 2008. For two or three days I was thinking am going to carry on playing is it worth it but that passed and I got fit.
Carrick went on to confirm that a coaching role at United was "looking likely" as he plans for life without playing professional football for the first time in nearly 20 years. "I am trying to help a lot more because I understand where I am at". The problem emerged when the midfielder complained of feeling dizzy following United's Carabao Cup win over Burton Albion in September.