"Unlawful presence", age out 21, filed COS F1 on time

[User3456]

I filed COS to F1 5 months before my L2 age out (turned 21 seven months ago),  but still have no decision or RFE from USCIS. 

1. Am I accruing unlawful presence? 

2. If I leave US before final decision from USCIS, will any time spent after turning 21 be counted as unlawful presence?

I appreciate all advice.

[User3456]

Update to my post: my i-94 is admit until date Nov 2018.

However, I am still unsure of how that affects my situation if I have turned 21.

I want to apply for f1 visa from embassy, but I’m worried if I’ll be subject to any unlawful presence because of turning 21 and it will be used to deny my visa.