By grace through faith

I know that salvation is only by grace through faith in Christ alone. Yet I still can’t get that through my head. My mind keeps twisting this idea that because my works are never sufficient enough I’m not saved. I know I fail a lot and I try to do better but I keep getting mixed up with works based salvation when Ik it’s not true. It’s like my mind is lying to my heart. I don’t know how to change this. I realize that my works are a testimony to my faith and is shown through following Christ after we receive salvation. I just don’t understand why my mind keeps planting thoughts of my works and I always get confused on it too.