I think contacting the relevant experts is possibly the best way to find out where you stand.

But just a thought... Could you go on maternity leave now rather than resigning? If you did you may be able to start getting paid your leave now and take your annual leave at the same time... It could be possible that if you had a letter from your doctor/midwife saying that you needed to start maternity leave now because the stress of working was causing you problems you may be able to get the payment... Anyway just a thought. GL with it, I hope the situation there improves soon.