You can claim for universal credit 😊 until you give birth they will likely be asking you to look for a job, but once you've given birth you are moved to a different 'group' and not required to work for 3 years. If you are married, make sure you do it as a joint claim as they will take your partners earnings into the calculations as well 😊
You can claim UC NHS healthy start card they will give for ur first £17 and pregnancy £17 and once u give birth they will give baby £34 so u will be getting £51 monthly
The benefits calculator here is very helpful: https://www.turn2us.org.uk/