20 weeks pregnant and unemployed!!

Hi girls, just looking some advice not to be mean but preferably from girls who are from the uk. I'm 20 weeks pregnant and left my job yesterday due to my general health and the well being off my pregnancy, I know that nobody else will hire me because I'm so far along and will be off on maternity soon so my last option is to try and receive benefits for the mean time. Would anyone know what I would be entitled too?