Thanks
@anjelikaferrett @COYBL25 and
@BiggyRat - I mentioned to my boss that I've been having these weird fatigue symptoms and she seems to think it's stress and is sympathetic to it so that's quite positive. Just a perfect storm of things going on the last year or so. Massive workload increase, new role (promotion), new people coming in around me who have a lower opinion of my abilities than the ones there before them (at least that's my perception, I don't have solid evidence on that). And to top it all I don't really enjoy it. I'm looking to move in another direction all together but it's taking some time
Ask your boss if there's any training or mentoring related to stress management available. Quite a few companies are waking up to the fact that it pays to make sure your staff can cope with stress in the workplace.
If there isn't then my advice is as follows. It might not be appropriate to your work situation, but some of it likely is.
First, and most importantly, learn how and when to say No. If you can't realistically do what you're being asked to then, then say so, explain why it's not possible, and, ideally offer an alternative. But the most important bit is saying No. It's not easy to do, and can be quite scary at first, but I started doing it years ago and our company now have a reputation for being realists who, if we say we'll deliver something at a certain time, will do so unless external influences stop us.
Secondly, if you're at all in control of a situation ( eg you've been asked to estimate how long something will take ), be realistic and don't commit yourself to something you can't do without working all the hours god sends. If you do have some level of control, and you struggle balancing your workload, ask for some help with time management.
Try to take a step back occassionally and look at the bigger picture and decide which if your tasks are the most important. There are always priorities.
If all else fails and the job is making you miserable, then start looking for another one. You're probably much more highly regarded by your management than you give yourself credit for, so when the requests for references start coming through then they might sit up and take notice.
If you do end up leaving the job and they do exit interviews then explain why you're leaving. Chances are it'll make no difference to how they treat folk in the future, but if they don't know, they certainly won't change !