You may be experiencing an acute stress reaction following your breakup, which can commonly lead to low mood and disturbed sleep. Try to maintain a fixed sleep routine, avoid caffeine in the evening, limit screen time before bed, and do light relaxation breathing exercises. Speak to a trusted friend or family member and try to stay gently active throughout the day, even when motivation is low. If your sleep does not improve or you continue to feel very low, or have any thoughts of self-harm, please seek help from a doctor or mental health professional promptly.