how to cope with Anger and frustration

After pregnancy, i felt at times very frustrated and easily irritated. I am blessed with a smooth delivery without complication and a cute healthy baby. But ever since i discharge from hospital, i had a bad CL experience, which i dimissed her. I have been taking care of my baby on night shift even during the day, which now i still have work to do despite i work from home. Things piling up and made me so frustrated. Any suggestions that can help me out?