Quoting Angelica Munoz:" its more common before 12 weeks. Its less common after. My OB said that if I was 20 weeks they would ... [snip!] ... keep in the hospital to see what different options I could do. So I'm guessing at 20 weeks they can get the baby out premature."
They can't really do much at 20 weeks either except monitor you and the baby. They can admit you though and keep you in the hospital until you're stable. 24 weeks is 'viability'. At that point, there's about a 50% chance of survival. You can get the steroid shots, etc.
If i was in your situation, I wouldn't be real comfortable going back to work until the bleeding completely stopped. I would talk to your ob about extending bedrest for another week or so at least and then another U/S to see what's going on in there.
Pelvic rest = no sex, no lifting anything over 10 lbs. No nipple stimulation or orgasms. Only light cleaning if you can get around it.