The only things I know about are the pregnancy grants. You should be entitled to Income Support from 29 weeks pregnant. And once your on I.S you should be able to apply for the Sure Start Grant which is £500, and the Health In Pregnancy Grant, which is £190. You can also apply for Healthy Start Vouchers, which helps with fruit, veg and milk (gives you tokens for them.)
Go to your local council or ring them. Or go on the direct.gov website and there is a 'what am i entitled to' part (However, if your not over 18 it may not let you do it online, your better actually taking in person/phone)
Good luck, hope all works out.