Pls help!! a question about benefits!?

well iv been on jsa for bout 10 weeks, im 4 n half months preg, im jus wonderin if i hav to stay on job seekers up to 29 weeks for me to get the �500 maternity grant, surely i dont hav to look for work at 7+ months preg??? if i go on ESA, do you have to be on it a certain amount of time?? can i even get it on ESA?? im really confused, pls help!! thanks!