There's uncertainty about injuries regarding the nature of the injury. Drs have the most educated idea of the required timeliness of treatment.
You seem to believe that you can get surgery to reattach a tendon at any time. Please don't have confidence in your conclusion and see a Dr.
For myself, I don't believe in hoping for reattachment for a detached tendon regardless of what I can find on the internet and have decided that I would see a Dr right away. I have also heard one bad story of waiting for a very short time on one particular tendon detachment and losing the option for surgery. ?? There is also the simple logic - if a tendon separates and pulls back from the attachment site on the bone, how does it find its way back to reattach?