Dealing with Anxiety

I've been dealing with panic attacks for over 3 years. I've tried to work through and face them with and without medication. I've realized that there is something I can do that I haven't thought of before. Could my anxiety be a sin and lack of faith. The Promise is, "If we confess our sins, God is faithful and just to forgive us our sins and cleanse us from all unrighteousness. I have begun working through this confession and to find the wisdom to deal with these attacks. Truly there are promises we can use to face the anxiety that I am feeling. Such as, "Casting all your care upon Him for He careth for you." "Be anxious for nothing, but with prayer and supplication with thanksgiving let your requests be made known unto God and the peace of God shall guard your hearts and mind by Christ Jesus." I am just beginning to confess the sins and doubts and anxiety. I have high hopes that God can truly use the tool of confession to help me to overcome this besetting sin. I am also seeking to overcome the Enemy by using all of God's promises. "Thy word have I hid in my heart that I might not sin against God." 2 Peter says, "Whereby we are given unto us exceeding great and precious promises that by these we might be made partakers of the divine nature."