I doubt there are many believers in Jesus who have not experienced at least one miracle in this life.
For me, there was the time when my sister was sent to the hospital because she was hemorrhaging internally. The doctors could not stop the bleeding, and things were becoming critical. My parents called for the priest to administer the Prayer for the Sick. Which, if you know anything about Catholic doctrine, you know is the sacrament you often receive just before death. Moments after the priest prayed, however, the bleeding inexplicably stopped.