Firstly, - you had not risk of HIV.
I suffer with Eczema and have had bad outbreaks in the past with open cuts - this carries no risk.
Window periods are irrelevant for you as you had no risk, do not google test window periods as there is a lot of outdated and quite frankly incorrect information out there.
Best Wishes you HIV Negative man you! :)
You really are okay, go and live your life without the worry my friend, - you really are okay! :)