I think your entitled to maternity leave from as soon as your employed, so should be ok but I would go in and consult with your manager
I have been on and off work since week 11 asiI had hyperemesis and then severe back ache and I am entitled to full maternity pay, if it is due to your pregnancy then yes you should if it isn't then I'm not sure check with your company
It all depends on how long you where employed before u fell pregnant, but if u are entitled to maternity leave they should start paying u it when u r 28 weeks pregnant.