Maybe you would get in trouble, maybe you wouldn't. If you claim someone TRIED to grope you, that could be pretty nebulous and would likely result in battery charges and probably little ability to argue self defense. Assuming the other party called the police, of course. If someone was really trying to seually assault you, I doubt they'd be keen on calling the cops.
The bottom line here is that no one can say what will happen in a hypothetical "what if ..." scenario. A lot depends on facts, details, statements, and other evidence. Not to mention the state of occurrence and the nature of self defense laws in that state.
So, I recommend you avoid places where men or women are trying to grope or fondle you against your will.