Hoping someone knows this fic I'm searching for.
Posted on AO3.
Starts off with Tony being woken up by JARVIS because he has a meeting with Fury. However, Tony feels...off/sick/wrong.
He goes into the kitchen to get some coffee in hopes that caffeine withdrawal is the problem (It's not.). When he arrives, he notices how the team has become so comfortable with one another since moving into the Tower.
Tony picks up an iPad/tablet where an alert tells him why he's feeling like complete crap. He needs to replace the arc reactor. Without even thinking about it, he pulls it out to examine it. The team is shocked into silence. Tony realizes what he's down afterwards.
Turns out, something has been wearing the reactor down enough to cause Tony's symptoms. He's been so busy that he's been putting off repairs.
Team scrambles to help Tony since Bruce (?) says that without the reactor, Tony could go into cardiac arrest.
Other clues possible clues, or I'm just getting stories confused:
-might be something about Natasha wearing a My Little Pony t-shirt and not shaving her legs, but still looking deadly?
-Clint taking Tony's mug, Bruce offering his instead (green-SMASH written on it)?
-Bruce cooking and changing Tony's coffee to something less bitter?
-Steve reading a newspaper (one of the only non-technical things Tony has---something about being almost completely paperless?)?
This is driving me nuts because it's on the tip of my tongue!!
FOUND: AO3: http://archiveofourown.org/works/448135