I find it so difficult not to be anxious! But this is what God says...
4:6 Have no anxiety about anything, but in everything by prayer and supplication with thanksgiving let your requests be made known to God. 4:7 And the peace of God, which passes all understanding, will keep your hearts and your minds in Christ Jesus.
I was very backslidden in my heart around Christmas time this past year (to the naked eye, no one knew, b/c I wasn't out doing anything that was obvious sin; I'd simply drew back) and I had major anxiety. I was physically sick from it and i was getting anxiety attacks for no good reason. Hadn't been like that since before I was born again...so every time I felt the anxiety, I'd read out loud the Word; didn't matter where, although the Psalms are especially soothing at times, but any Word and the anxiety would pass. I kept doing that til it left. I stil have moments, and the Word of God is powerful!