Thank you for asking. I can understand the distress you are through. What you are through currently, is an adjustment phase. After breakup, one experience symptoms of repeated thoughts, restlessness, irritability, not able concentrate on work, frustration, anger outburst etc these all are withdrawal due to sudden loss of emotional support. They will gradually resolve over a period of couple of weeks to a month.
Next Steps
A consultation to Psychiatrist would certainly help. You can also ask a detailed query here on practo or visit one nearby you.
Health Tips
Do not worry. You'll be all fine.