It sounds like your xiphoid process is inflamed.
A common cause is costochondritis. If you have no other symptoms, and you only hurt when you press, this is very likely. If there are any other symptoms then a heart problem must be ruled out.
I am going to provide a link for you to read about costochondritis, and I would advise you to contact your doctor in the morning to make sure that no testing or other treatment is needed.
If you have any further questions or other information for me, please contact me.
IF I HAVE ANSWERED TO YOUR SATISFACTION PLEASE PRESS ACCEPT. FEEDBACK IS ALWAYS APPRECIATED.
You're welcome. I 'm glad I was able to help.