Thanks for posting your query at HealthcareMagic.
First, i would like you to mention, stress
usually does not cause inflammation in the region of the incisive papilla.
After reading your symptoms i feel that you may have injured/scraped that region due to something hard in your food. If you keep touching the area with either your tongue or your finger, it can lead to interruption in healing resulting in inflammation and pain on probing.
I would recommend you to apply any good topical anaesthetic ointment in the area 2-3 times/day. Do not aggrevate the lesion by touchimng it. It should resolve in a day or two. If the problem does not reolve, you should visit a dentist
for oral examination.
Hope you feel better soon.