Since your itching has lasted for three months and worsens at night, it is important to see a doctor for a proper diagnosis, as it could be due to eczema, scabies, or even pregnancy-related liver issues (if applicable). For temporary relief, you can apply an over-the-counter 1% hydrocortisone cream to the affected area twice daily. Taking an oral antihistamine like cetirizine (10 mg) once daily can also help reduce nighttime itching. Keep your skin well-hydrated with a fragrance-free moisturiser, use mild soaps, and avoid hot showers. Please consult a healthcare professional before starting any long-term treatment.