I'm currently 23wk+6 and since I was only 10 weeks pregnant I have only managed 3 days at work - initially due to 3 unexplained bleeds and then problems with my own health. I have almost made it back to work on 2 occasions but deteriorations in my health just led to more Sick Notes.
I have been off for 13 weeks now and am driving myself insane with boredom!!! My current Sick Note runs out next Friday but when I saw my GP for review this morning she signed me off again until the end of the pregnancy!!
I understand why and I know the baby is what's important but bloody hell, what am I going to do with myself for the next 15 weeks?? 
I went into work earlier to let them know and to clear my desk etc and it felt really sad - I was so looking forward to going back.
Has anyone else had prolonged Sickness and what did you do to stop yourself from ending up crazy???