With certain circumstances, anything can be triggered. In situations like that, you should always opt out. Immersing yourself in a situation where you are recreating a traumatic time can be in fact, traumatic. So, don’t be afraid to remove yourself from the situation.
Have you thought about talking with someone who can better understand your situation? If not, you should. It seems like you have pushed the issue out of your mind, and simply not handled it. If this is indeed true, then you will need to tackle the issue with someone who specializes in the treatment of your issue. Do not let this become an issue again.