她开始担心了，但幸而不知道这些潜在后果。

She was concerned but still blissfully ignorant of the potential ramifications.

youdao

她开始担心她的男朋友打算结婚不是认真的。

She began to worry that her boy friend's intentions might not be serious.

youdao

她戒了酒，但开始不停地担心她的体重。

She stopped drinking but began obsessing about her weight.

《柯林斯英汉双解大词典》

And you're starting to feel a little bit concerned.

你开始有点担心她了。

You look 课堂 - SpeakingMax英语口语达人

But you're starting to really feel concerned about this old woman, so you say, "Let me hold your bag."

但是你开始为她担心了，于是你说，“Let me hold your bag.”

Let me 课堂 - SpeakingMax英语口语达人