Brief background:

Started role in July 2011 as maternity leave cover (admin/accounts payable)- 6-12 months but expected girl would return November 2012. I have a working background in the industry so was perfect for the role and quickly settled in.

September 2011 my position changed (commercial admin) and I took over the commercial side of our business for our depot (basically looked after it all with minimal assistance from other staff and my boss). Loved this job as it showed my expertise and I quickly took over more duties. New person started into admin/ap role with lady leaving for maternity leave in October 2011. Basically we both got 6 weeks handover with her.

November I took on more work which was about 1/4 of the original admin/ap role - again showed my expertise and quickly how valuable I was.

December - found out I was expecting! Boss was happy for me but knew straight away it would be difficult to replace me as I had just taken over more of the admin/ap role (now doing 3/4 of that as well as my own job - girl was hopeless to say the least)

March 2012 - admin/ap girl was sacked and I just took over the whole role and mine (with a few things transferred to other staff members but I was happy as I was busy for the whole day and really excelling which senior management noticed - I was also completing a uni degree whilst working)

I was planning on working up until 20/7 but health soon deteriorated and it was determined that getting to 30 weeks was a priority over work. So in April they started looking for my replacement and someone started quite quickly. Health had improved so we decided my end date would be 8th June - 6 week handover but I was flexible to stay on a bit longer but this would be discussed and would be what I wanted.

So June 8th came, replacement still hadn't cottoned onto all my job, so I agreed to do 2 more weeks at part time hours, new end date 22nd June.

That date again changed and I said I wouldn't work past 6th July as I was really starting to feel the pregnancy and wanted to spend some time with DD (she was in before and after school care, at her dads every 2nd weekend and my weekend was spent with me doing uni - not very fair)

Things were going fine, role reworked and more of my work put onto other staff who had more expertise in that area. I had expressed my concerns to my boss quite some time ago that I didn't feel my replacement would cope, which was quickly dealt with but was told give her more time. I am quite good friends with my boss outside work and she knew my frustrations but her hands were tied as her boss (and depot manager) liked this girl.

So skip forward to today. Ive been counting down and looking forward to finishing. This week was meant to entail final training, update of my procedures and any loose ends. Easy week really (I'm still only doing part time hours - depends how I feel each day but usually 5 hours). I get into work at 9, my replacement in with my boss. Start doing what I have to and at 9.30 boss calls me in and informs me my replacement is leaving - I thought she meant just today (like she's sick) but was quickly told that the job is simply too hard and doesn't want to continue. To say I was fuming is an understatement (so was my boss). Only 2 weeks ago we again asked her how she was doing and not once did she mention too much work, too hard etc.

There is a lot to my job, but simple prioritizing etc means it can all be done in the week.

My boss said she feels guilty asking me to stay longer but I feel guilty leaving her in the lurch. We were joking today that at this rate I'll never leave.

I'm torn, I'm exhausted but could really do with the money. GP today said I'm fine to keep working if I'm up to it. There is no way I would do full time hours. DD is at her dads next week so I was going to be home alone nesting anyway - would working be that bad?

My boss couldn't get a definitive answer on what managements position is on finding yet another replacement as our business is also for sale (so when sold really the position will be made redundant)

What would you do? I'm only 36 weeks so can potentially work more. But given its not like a job I can go back to (I'm only a temp anyway) should I just cut my losses. I'm waiting to speak to my boss outside work and really gauge her opinion. She after all is like a big sister to me (and may potentially be in there when I give birth).

I'm torn, I don't want to let her down but I also want some me time.

And feel free to tell me I'm stupid for thinking too much about this (my mother already has!!!)