Today, while breast feeding my 7 month old before his nap, I hummed his favorite song as I rocked. He pulled away, stared at me, and cried til I shut up. FML
actually I bet it was the milk thay wasn't his favorite anymore. Judging by the timing (7 months) her period might be back and that changes the taste. It is really common to have feeding issues like pulling off at that age. Mine did it at 4 months and 5 months, it passes but really sucks for momma.
In the words of Shemp Howard, to help your voice you should gargle with old razor blades. Actually your voice is probably fine, it was probably a change the baby did not want.