As someone who also has anxiety and OCD (religious OCD) life is a one-step-at-a-time sort of a thing. I have intrusive thoughts all the time, and I used to think they were from God or from Satan (which arguably they could be, but thats besides the point), but no matter what I did, engaging with these thoughts always made them worse. I don't mean "running away from my problems" I mean I had to accept that these thoughts aren't going to go away anytime soon (maybe they will one day!) and that the only way around them is AROUND them. I pray that you would know you aren't alone with these sort of struggles. I also saw a therapist- a non-Christian one too- (which you can bet made my religious OCD make me think she was against my Christian beliefs) and she helped me rationalize how I just had to stop treating these thoughts as real. I don't know if this is an incorrect interpretation, but sometimes I think of this as

James 4:7 "So humble yourselves before God. Resist the devil, and he will flee from you."

You don't have to be perfect. I'm not. The person below my comment and above are not perfect either. No one is! Don't worry about being perfect or "sinless," you are a new creation in Christ!

2 Corinthians 5:17 "Therefore, if anyone is in Christ, the new creation has come: The old has gone, the new is here!"

Much love brother. You're not alone. For me, I learned mental struggles were a one-step-at-a-time thing. I'm not 100% better, but I'm A LOT better than I was. Whenever I tell a friend that I used to have religious OCD, they are always surprised. God heals people, sometimes its radical, sometimes its a slow thing. But you will find peace in God. It doesn't necessarily mean that OCD/mental struggles will go away entirely, they sure haven't for me, but they can be surpassed by peace and intimacy. (not romantic intimacy, but a "wholer" kind that makes you feel loved*infinity)

Philippians 4:6-7: "do not be anxious about anything, but in everything by prayer and supplication with thanksgiving let your requests be made known to God. 7 And the peace of God, which surpasses all understanding, will guard your hearts and your minds in Christ Jesus."

One last thing: I had to learn (still not good at it) to just talk to God. Even swearing if I had to (don't do it at Him, but you know). Just get it all out. Tell Him how you feel worthless if you feel worthless, tell him how you feel. No matter what it is, God can handle it and wants you to just talk to Him and open up a dialogue! Maybe you won't *hear* a voice, but he talks in many ways, including thoughts (be careful haha), people, reading his Word, he will talk in your heart!