Disciplinary proceedings at work are stressful. If you’re facing disciplinary proceedings, it can be tempting to go to your GP and get signed off work.
Unless you really are too ill to go to work, this is a bad idea. The disciplinary proceedings themselves may or may not be well-founded, but your employer is entitled to investigate any allegations and conduct a disciplinary hearing. If unfair dismissal proceedings are on the horizon, you need to behave all through the disciplinary process in a way that will engage the tribunal’s sympathies on your side, not your employer’s. If you go and get a sick certificate at the first sign of trouble, and then refuse to have anything to do with your employer’s attempts to conduct a disciplinary process – worse still, if you refuse to cooperate with their attendance management process as well, fail to respond to messages, miss OH appointments and so on - you’ll engage the tribunal’s sympathies on your employer’s side instead.
So it will normally be better to grit your teeth and cooperate with the disciplinary process. After all, if it’s the process itself that you’re finding stressful, why should it be less so after you’ve been off work for a few weeks months? And ultimately, if you stay off work with stress for long enough, you’ll hand your employer a cast-iron excuse to dismiss you for poor attendance instead of whatever they want to discipline you for.