You should:

1. Seek knowledge: Learn about Islamic guidelines on halal income

2. Evaluate your source: Assess your job, investments, and business dealings

3. Consult a scholar: Get guidance from an Islamic expert

4. Purify your wealth: Give away doubtful income or donate it to charity

5. Make a change: If necessary, switch to a halal income source

Remember, purity of income is crucial in Islam.