You say you've been out of work for a few months - you may still be eligible for Maternity Allowance, it depends on how much you worked in the year prior - something to do with the 66wk period prior to the 11wk date. MA is about £20/week higher than joint JSA.
For example, I've been out of work since Feb, but I'm still going onto full MA because I was working full-time last year.
I know the feeling of neither of you working - I moved to be with my OH in February, and he was laid off in May. So we're juggling a joint JSA claim, HB, CTB, switching to MA, the question of whether its worth him still signing for JSA given that I get MA, etc etc etc! I think I've got the system sussed now, so if you want to chat by private message, drop me a line!