I really need help here, I am struggling on what to do and the advice I have received has been less than helpful from other places.

To protect myself, I will not reveal where I work or what I do.

My current job has me working 60+ hours a week, 6 days a week with only Sunday as a break. My contracted hours is meant to be 30 a week with Sunday and one other day off so roughly half of that. But the work we do is actually meant for people who work 40 or more hours a week. Bit complicated I know. Best way to sum it up, we work 30 hours, but are expected to work up to 40 and then any overtime if wanted.

I've always been a hard worker and wanting to prove that to my managers. So I have always wanted to be helpful when needed. Which has been my downfall here as I was out of work for 2 years and obviously want to keep my job by doing anything and everything I can. My nature has always allowed others to use and abuse me.

Because I've done this work, the managers assume I will always do it now and automatically put me down to work overtime (which is asked of me) and my day off (organised before even discussing it with me first). I'm always offered overtime which is nice because I don't mind working if it helps and the money is always useful. But it is everyday and constant. The next problem is that the overtime work changes without my notification. Usually I got told one thing, then it turns out to be something completely different, usually longer and harder, but still expecting it to be done in the same amount of time.

Lately I've been feeling exhausted, coming into work tired, no interest in anything. My life is work and recovery, no enjoyment. I am currently on a week off, and in that time I've felt anxiety and discomfort in my chest, around the centre point of my ribcage which has only just realised coming to the end of the week. I have found breathing a little uncomfortable. I have been to Doctors who cannot locate anything serious so I put it down to stress and anxiety.

My workplace is one of complacency and laziness. People don't want to work and just leave things for others (namely myself) and yet they get away with murder. Because I am 'last in' I get the impression it is expected of me to work (and there are other newbies who come in and nothing is said - at least not in my audible range). I get knowing glances and smiles that give the impression I am their work slut to dump things on whilst they wing their merry way home on time.

I am at the point of wanting to do something, but I am struggling. I know what I would like to do. I want to say no to the managers and for them to appreciate my response. But all I get when I do say no is guilt and grief as though I should be doing it. I want to quit, but I am frightened I won't get another job, and I also want to sort things out but fear for ridicule and bullying.

In my previous two jobs, I was bullied and stressed out because of a misunderstanding and twisting of my words. I am fearful of it happening again. Please any advice would be appreciated.