What is the ruling on obsessive thoughts and worrying about the future, while committing to prayer?

Cast away your obsessive thoughts and anxiety about the future, and entrust your affairs to Allah. Surrender to His حكم (judgment/ruling), be content with His قضاء (decree/destiny), and harbor good thoughts about Him. For what is with Him is better for the righteous. Know that Allah decrees nothing but good for the believer. What will remove this anxiety from you is having good thoughts about Allah, sincerely relying on Him, and knowing that what has been decreed by the Pen will certainly come to pass, and that what has befallen you was not going to miss you, and what has missed you was not going to befall you. Therefore, occupy yourself with the interests of your religion and your worldly life, and strive to guard your thoughts.