The feelings that you have are a reflection of the hindrances in the mind. And to access that hindrance, you want to start by watching the feeling.
If you are thinking about the thoughts as hindrances like aversive thoughts or anything that is motivating the whole thing, you can get into thinking.
You use the feelings as an anchor to recognize what the hindrance is.
Continue to watch that to see how it changes, watch how the feelings change and then you can see how the hindrance changes.