God's love is unconditional, but He is still a Holy God. We must humble ourselves and pray. God wants to heal us. He said "If my people, who are called by my name, will humble themselves and pray and seek my face and turn from their wicked ways, then I will hear from heaven, and I will forgive their sin and will heal their land (2 Chronicles 7:14).
"Seek ye the LORD while he may be found, call ye upon him while he is near (Isaiah 55:6).