Looking for Jemima Waters Suffolk Essex

Hi Can you please help me locate my 4xGt Grandmother Jemima waters?
All census records show that she was born and lived in Belchamp Walter.
She was born circa 1790 supposedly Belchamp Walter but I have not been able to find any birth for her there.
She married George Pilgrim in 1812 Belchamp Walter and died there in 1870. The Pilgrim family was quite large (13 kids) so a solid Belchamp Walter family. I have all the information I need at the moment on this family but nothing on Jemima. I am now thinking that she was either born out of this area but have nothing to go on, I am in Australia and subscribe to Ancestry.com.
If you can help me in any way I would be very grateful.
Thanks
Dave