CharBell-lots of sympathy. I'm also at 27 weeks My boss isn't scary and disaproving, although he is a bit of a prick (despite having kids himself-but his partner stays at home and he doesn't agree with mothers working...) but I work for a charity which may be about to go under. They simply can't afford to fund stretches of sick leave and it doesn't help that a few other people have been off on long term sick.
I've had a few incidents of bleeding, quite similar to yours. Was similarly advised to rest (not specifically not to work but I'm pretty sure that the doctor assumed I wasn't working due to existing young child).
I basically went in, finished up and started holiday followed by maternity leave. If I hadn't done this, the loss would have been to my clients who are people who need help to claim benefit-eg single mothers whose Income Support payment has gone missing. They should have systems in place to deal with this but they just don't.
I have to say that I got told off for calling into work late and inconveniancing a client. I had been admitted to hospital and that was the first time I could get to a phone. This helped me to develop a real f**k you attitude towards them.
My direct line manages's attitude was "when I had a miscarriage, the first thing I made my partner do was phone into work". I have to say that that probably wouldn't be the first thing I would do (maybe call the hospital?). At the end of the day, it IS just a job.
Work can be b**ds. After the baby is born you will probably find that whatever you do, you are a. not taken very seriously b. you have to juggle to the extent that work WILL suffer. And this will probably be deeply upsetting after you have worked hard for them for years.
So just sympathy really, and I've got an idea of what it is like. I'm sure you have an idea of your legal rights and you know that they couldn't techically sack you or anything for taking time off in connection with pregnancy. But in practice that isn't worth much-I've been repeatedly passed over for additional responsibilities, always on pretty shaky grounds, since my son was born, and more so since I announced pregancy no 2.