ACT scores yet to be released? Self-report on Common App

I took the ACT in September 2017 and have yet to receive my scores, which I feel may be a massive improvement from my previous test taken in March 2017. However, I am trying to make the early application date for Chapel Hill on October 15th using Common App, and was wondering if I should just put my old March score? Should I add anything about a "future testing date"even though I don’t plan to retest? The ACT website is saying that they may take up until November 3rd which is especially frustrating… Thanks