Hi @acwalker84,
As MattWeston365 mentioned there is currently no way to trigger a flow from within an email.
I wanted a similar process to you and so if I want to run a certain action on a certain email I forward that email to myself with different "trigger" words in the subject line. I then have a flow which checks for emails that I have received from myself and run conditions based on the subject line.
Not ideal, but the best I could think of at the time! A similar process may be suitable for you.