The love of Christ controls us. Not duty, not fear, not guilt. Love. Paul describes a force that comes from within, not imposed from outside.
In the New Covenant, motivation is completely different from the Old. Under the law, fear of punishment drove people. Under grace, love drives. And this love is not your achievement, it is Christ's love working in you.
When guilt arises without a concrete reason, it is often an echo of old patterns. Christ settled the accusation at the cross. You are acquitted. Let love guide you today, not fear.