... because she had worked/she had been working ...

[licris]

In the sentence
Ivana had s splitting headache yesterday evening because she had worked in the sun all day and she hadn't been wearing a hat.
Is it correct to say
Ivana had s splitting headache yesterday evening because she had been working in the sun all day and she hadn't been wearing a hat?

 

[Tarheel]

She is not working in the sun anymore. That is an action that is finished.

There is a typo in post #1 (two times).

 

[5jj]

Ivana had a splitting headache yesterday evening because she had been working in the sun all day and she hadn't been wearing a hat?

That's possible.