Pain is a feeling which is perceived by different persons differently. Its something which connects us at a different level. Well, have patience and try to understand something which I am about to say because its self contradictory. Everyone is in pain at some point of life which defines that human's forecoming personality (future self). It makes us even though it breaks us. Now people can truly connect to each other only if they have been through the same pain. The feeling of pain that a human has can only be understood when you have gone through the exactly same situation otherwise you won't be able to connect. Once the situations are same this is what makes you understand that person and you know how it feels, how much it hurts. So, beware when you say you understand as you would be lying to that person and believe me you don't want to lie to a person in pain!
Let me know your pain even though I might not understand but will try to help.