Hopefully making theology simpler to understand! (2 Corinthians 1:12)

do not be anxious about anything, but in everything by prayer and supplication with thanksgiving let your requests be made known to God.

Philippians 4:6, ESV

It is okay to be concerned about things, but our concern should not become worry and anxiety. Rather, we should talk to God (pray and ask), thankfully remembering that He proved His power and faithfulness through the cross.