I suspect that this poster suffers from Obsessive Compulsive Disorder and as a consequence of his illness is unable to let go of the "but what ifs" of any given situation. If that is the case I have a certain amount of sympathy. It's not his fault and he can't help it.
Poster, to simply get this out of the way, I'm going to answer your question literally. But keep reading, because you're asking the wrong question, and I'm going to answer the question I think you're REALLY asking after that.
To answer the question you have asked, Zddoodah has given you one scenario. Within the legal system, the worst that could happen is that you are arrested, charged and convicted of indecent exposure, which is a misdemeanor offense in your state and carries with it possible sentences of fines up to $1000 and up to six months in jail.
Okay, that's out of the way. You know the worst.
But the question you ought to be asking is, "What are the odds that anything at all is going to happen?" And the answer to that is, so low that I don't think they've yet invented the instrument that is capable of estimating odds that low.
If anything were going to happen, it would have happened on the scene, with the evidence still in hand - so to speak. If the entire incident ended and you exited the garage without any law enforcement office shouting, "Stop, you criminal" or words to that effect, it's so likely that nothing will happen that the only reason I'm not saying there's NO chance is that I don't believe in superlatives.
Oh, I hear you next inventing, but what there wasn't a cop on the scene, but there was a civilian who saw me, and they then reported me? Unless that civilian had a cell phone and recorded you, (and in that case for them to be close enough for the recording to pick up anything worthwhile, you'd have likewise been able to see them), not only the cops but also the DA would have to be very, very bored with far too much time on their hands and not much of a case load before they would bother trying to identify you and then arrest you when by that time there would be NO evidence beyond the witness testimony. Which IMO is not sufficient evidence to convict you. Even a bad attorney could get "reasonable doubt" on that one without even breaking a sweat. Not to mention the fact that what you have described would have to be stretched pretty far to fall under the statute to begin with.
So relax.