Text: my doctor first prescribed a different antibiotic to clear up my mastitis, but i had severe side effects and we have to look for an alternative.

Correct capitalization: My doctor first prescribed a different antibiotic to clear up my mastitis, but I had severe side effects and we have to look for an alternative.

Text: when the brown fat is broken down, generated a lot of heat, and you never see an infant with "goose bumps".

Correct capitalization: When the brown fat is broken down, generated a lot of heat, and you never see an infant with "goose bumps".

Text: most people will empathize with you if you need a bring your kids to the arena, but they will not tolerate boisterous behavior that would interfere with concentration and prevent the hearing while the numbers are called.

Correct capitalization: Most people will empathize with you if you need a bring your kids to the arena, but they will not tolerate boisterous behavior that would interfere with concentration and prevent the hearing while the numbers are called.

Text: the download still requires validation before the package can be downloaded to the local system.

Correct capitalization:
The download still requires validation before the package can be downloaded to the local system.