Just fill out one of those NASA forms. It may end up helping others from making the same honest mistake.
And save you from possible enforcement action if it ever came down to it. Actually, there may be several ASRS forms filed for that airport already and you might just get some safety changes to be made. You never know.
Just to reiterate what my fellow CFI said to you: ALWAYS be vigilant on the ground. As a pilot, you are more likely to screw up on the ground than a lot of other places, because a lot of pilots (and flight instructors for that matter) tend to skim over on-airport safety and focus on more fun things. Best things to keep in mind:
1) Of course, always keep your head up. There's nothing on the instrument panel that's going to help you out at all while you're taxiing. I saw a 206 roll into the grass one day because the pilot was fumbling with the GPS while on the way to the run-up area...not a good start to the flight.
2) This one kind of goes with the last part of #1. Do all your setup stuff while stopped. Get the cockpit organized before engine start, set up your navs/GPS/comms either on the ramp or in the run-up area. Nothing's so important that you have to do it on the roll. Pay attention to your wind correction and maintain a scan similar to one you'd do in the air...watch out for that errant rampie on an out-of-control baggage tug, or even good ol' Dale on his Scag mower that might decide to shimmy across the taxiway in front of you.
3) When you're in the run-up area and using your checklist, it's VERY easy to bury your head in the instrument panel (and your lap, where the checklist usually is). Bad idea. Hold the checklist over the yoke and do it. That way, you have to look up. You should always be looking out, anyway!
4) I find this, rather alarmingly, increasingly common. Make sure you are at IDLE while taxiing. Remember, it only takes a little bit of power to get going, and almost none to keep moving. DO
NOT RIDE THE BRAKES. It's VERY easy to do this and requires constant vigilance. Many throttles will "feel" that they are in an idle position when, in fact, they are running higher. Be sure to pull it back to the low end of the recommended RPM (typically 800). This will help you, particularly at hold short lines. The engine will be at idle and you will have less of an opportunity to start rolling. Everyone is susceptible to this...just a few days ago someone with 5x my total time did it with me in the airplane. It took me three times of pulling the throttle back for him to finally get it. It's not a race. No need to hot-rod. After all, we may really need those brakes someday.
Lastly, don't kill yourself over it. Even the boldest and self-proclaimed best of the CFI's on here have had something similar happen. I know I have!! It's just one of many, many, many learning experiences you will have in your long flying career