I don't know what to do. (该怎么办呢?)
Don't worry, I'll help. (别担心，我来帮你。)
I'm at a loss as to what to do. (我真不知该怎么办才好。)
I'm unable to decide for myself. (我一个人决定不了。) What shall I do? (怎么办?)
我该怎么办?
What am I supposed to do? *be supposed to “计划做??”。
What am I supposed to do? (我该怎么办?)
I don't know. Just relax, I'll help you. (我也不知道。放松点儿，我会帮助你的。)
What am I going to do?
What should I do?
