Between a rock and a hard place

Please bear in mind that I have a cold and am feeling less than 100%, and the knock-on effect on my ability to ignore/dismiss annoying people.

There is someone at work who is getting on my nerves.  This has been getting worse over the past week (which is roughly how long I have been coming down with/suffering from this cold).  She is constantly whinging about how she doesn't like her job now her team have merged with ours; this, that or the other isn't right; doesn't like all the phone answering/door buzzer answering/myriad other things that interfere with her ability to concentrate on what she has to do.  However, she doesn't whinge when the current acting Admin Co-ordinator is in the office.  She, and her colleague from the same previous office, can't cope with all this so when they have something that requires total concentration they go off to a different office for some peace and quiet. 

Now yes, to a point, I can understand it BUT not for one second does she consider that we others are in the same boat (and by buggering off like that our disturbances are increased).  There have been times that I have been doing something that I could really do without having to deal with incoming phone calls.  Does that count?  Does it hell!  I still have to deal with them and then try to re-focus on what I'm doing.

This morning I was doing something clerical with some client files and she knew I wasn't at my best.  However she was far too busy whinging to her colleague about how she hates her job now and doesn't want to come in (interspersed with actually doing her work), whilst I was answering the phone, taking messages AND e-mailing said messages to the correct recipients, all the while with a client's file 'in bits' all over my desk (burying my keyboard/mouse/pen/paper to boot).  Let's just say that by lunchtime I had had enough, burst into tears, played on feeling rotten and asked to come home.  We all have gripes about the 'new order'.  It doesn't help when the senior manager keeps taking systems that work and making changes, without considering the knock-on effect to our workloads.  If I'm honest my workload is the least hectic - it has its moments though - as I am not fully trained on all the in-house systems and therefore cannot do some of their work for them.  Plus my primary role is as phone answerer.  But I have just about had enough of keeping my mouth shut when she starts her whining.

I really don't want to go back there, purely because of this.  Yet it looks so much better when applying for jobs if you already have one than if you are unemployed, so I don't want to quit.  It's a temp position which will last for who knows how much longer and I'd really like to see it through to its conclusion if I don't land a permanent role elsewhere first.

So, do I stay and try my best not to blow a fuse big-time or do I walk and, although still with my temp agency, deal with maybe being between positions when applying for jobs.  I don't like the idea of walking as it can be seen to be taking the easy way out, plus what do you say when asked at interview, but it's playing havoc with my nerves.