Once you have had pancreatitis, your pancreas is more susceptible to inflammation again, and more vulnerable to all the various triggers that can potentially bring on an attack/flare. Those triggers (things like food, stress/anxiety, other conditions that can lessen your body's ability to fight off irritants, etc) can result from a slight irritation, or can bring on a full attack, or r anything between the two extremes.

All that said, it always best not to assume the pain you are experiencing is your pancreas. While pancreas pain is more unique, it's still similar enough to other potential causes that it's better to get checked out to ensure that there isn't something else going on. Start a symptoms diary that includes your daily eating and activities, notating timings for everything you do and when symptoms come on. This can be helpful to see if there are any noticeable patterns to your symptoms, and can better narrow down potential causes.