Uncertainty about abuse... Mixed with OCD

I read many posts on here knowing what they did and feeling remorseful about abuse they knew they committed. But my problem is different and very scary, its that I do not know if I did it or not, and the uncertainty is killing me. ):
When I was 13 years old my younger cousin who was 6 at the time was sitting next to me with a blanket over the both of our legs. Our whole family was watching television at the time. I remember getting a really stupid idea to move my hand as close to her privates as a could. (I remember that much). Then as I was sitting I slid my hand in her general direction on the bottom of the couch. My hand moved until I hit the side of her leg, or side of thigh (Not near privates). She then moved her hand toward mine and held it, (I think she thought I wanted to hold her hand). Once she held my hand I thought what the heck am I doing and I moved my hand away immediately. A day later I remember trying the same thing but this time she was laying next to me in bed. I moved my hand towards her sliding it closer and then I hit her leg or thigh again under the blanket (Again I have no memory of me thinking I hit her privates). Again the same thing happened as she moved her hand toward mine. At that moment I remember saying to myself "you are totally stupid NEVER do this again.
Here is what I know:
I just remember thinking after the first time that I did not do it so that's why I tried to do it again. I remember the second time thinking that I did not come close. But I am very very sure I have ocd so this is absolutely HAUNTING me. I full on am questioning if I actually did it and I am misremembering things on purpose.

But heres the main thing that gives me confidence, I was never worried about this for 6 years and never was worried she would tell anyone I tried this because I was positive I did not come close and she could not have come to that conclusion just from me touching her leg or side. This worry only came when my ruminating started, and I would exaggerate everything.

Any advice someone can give me about this would help alot! ): This feeling is the worst.

This is definitely OCD and you know deep down that you didn't do anything! Please reassure yourself that you have nothing to worry about and try to live your life glad of this fact. You can do it!

Thank you sprock, although I know at my heart I should not be looking for reassurance with ocd, your words help me alot. Thanks!