Hello Friend, Good that you are seeking a help. All your symptoms are sign of anxiety. You may be thinking too much about some past incidents or unhappy situations or careers or relationships issues. Such emotional imbalance also influence physical bodily function as well and hence you may experience nervousness, lack of energy, sleeplessness, constipation etc. No worries. You may need a counseling support to overcome this. Reach out to an psychology support nearby or reach me online for further evaluation.