Please Help! I was FIRED for SEXUAL Harrasement!!!?

I worked in an office, as a telemarketer. Anyway, there is this girl who cleans the bathroom. When she scrubs the urinals on her knees, I like to run in and pee in it while she is cleaning, so my junk is right by her face! It is a fantastic laugh. She gets so mad but I don't care. However, I have to run in and go fast cause she quick moves away if she sees me. Last week I was running in and I tripped over a bottle of cleaner she left and my groin hit her in the face. She flipped out and told everyone! I was fired for sexual harrasement and I may even get charges on me! It isn't sexual at all, I just like peeing in urinals when somebody is cleaning them! Can I sue her or the business for my legal fees or for my pain? Also, she NEGLIGENTLY left the cleaner on the floor.