Thank you, I’ll make that my new plan!

Three weeks ago, I signed up for a race with seven weeks to go and was planning to follow couch to 5k. Starting and stopping was too hard for me to track so I just decided to run as much as I can each day (with rest days). I can run three miles in about thirty minutes now, but just found out I actually signed up for five miles instead of 5k! Should I go back and try harder on the couch to 5k plan for a more methodical build-up or just try to add distance each week for the next four weeks?