Finding my negative thoughts

I realise that when I do thought downloads in the morning, my mind only goes to the positive things in my life.
I have succeeded in rewiring a lot of my brain towards seeing positivity.
However, I know there are negative thoughts in there as I am not creating the amount of money that I wish for in my business.
Usually, those negative thoughts come in when I sit down to work on something specific.
In the morning, should I intentionally direct my brain towards finding my negative blocking thoughts or should I rather do additional thought downloads when I sit down to work?
I understand it is not really efficient to ask my brain questions such as “why is it not working“.
I am looking for the most efficient way of proceeding.
Thank you for your guidance!