what is gramatically wrong with this????
Don’t think ah don’t feel wid you, Janie, ‘cause ah do. Ah couldn’t love yah no more if ah had uh felt yo’ birth pains mahself. Fact uh de matter, ah loves yah a whole heap more’n ah do yo’ mama, da one ah did birth

I only have two issues:

Don’t think ah don’t feel wid you, Janie, ‘cause ah do.

[This is a run-on error. The second comma should be a full stop (period) or a dash.]

Ah couldn’t love yah no more...

[Double negative. Ah couldn’t love yah more...]

Apart from those, it looks pretty good to me.