Ive had similar pain in my face.The watery eye and the fact that its all on one side points towards trigeminal neralgia.A regular doctor wont be able to help you,you need to be referred to a nerologist so they can confirm the nerve damage.In the mean time,make sure your getting plenty of b vitamins.Particullarly b-12.You can find it on almost all store shelves.The b vitamins build up over time and block some of the pain you feel.Its not a cure,but over time it will decrease the intensity of the pain.
looks like IT IS CLUSTER hEADACHE OR TRIGEMINAL NEURALGIA .Must c a doctor quickly.