I think I would be! A position has come up at a school I like, but I would have to go on maternity leave before the end of the school year. This feels a bit unreasonable to me, as the children could do with a bit of continuity and I think the staff would be annoyed that I'd applied for a job while pregnant. The thing is, I'm only just pregnant, and it's a slightly risky pregnancy anyway.
On the one hand, if I do lose the baby, I'd like to be working, rather than sitting home alone and moping. On the other hand, it's a physical job and a long commute and I've already had a threatened miscarriage so if I do lose the baby, I don't want to feel like it's my fault. (I know it wouldn't be, but I'd fee like it)
Obviously I wouldn't necessarily get the job even if I applied for it, so I'm thinking of applying for it and just seeing what happens 
Sorry that was long!