It's good that you're aware, @heartscally. I used to suffer from overthinking too, and a coach told me to set a time limit which upon expiring, I must take action.
John Maxwell also taught me this a few years back:
On tasks that has been done before, plan longer.
On tasks that are new, shorten the planning time, and quickly execute.
Wise words from John Maxwell! Yeah, I learned the hard way, but getting better I guess. It gets better everyday! :)