I would talk to your OB\GYN, they may be able to tell you whats wrong or refer you to the appropriate doctor who can help if she\he can't do anything for you other than to refer you to someone who can do something. Good luck. I wish you the best.
I sympathize I have a 9 month old.
Are you sleeping at least 4 straight hours?
You probably are sleep deprived.
Call your psychiatrist right away for some tips on medicine for Post partum depression.
Have you tried tylenol for your headaches. Also drink more water. Headaches are usually because of dehydration.
Sleep whenever your baby sleeps to get enough rest.
You may be experiencing some harsh hormone fluctuations/declines and this can result in a myriad of untoward effects. More importantly, your inability to control your temper with a 5 month old child in your presence is of the utmost importance. You must get an appointment with your ObGYN ASAP because post-partum depression is what it sounds like and this can lead to resentment toward your new baby, and may even lead to neglect and possible psychosis in which women have been know to try and harm their babies. It may be as simple as you adjusting to a new routine, and your body getting back to pre-pregnancy stage, but why risk it. See your Obstetrician NOW!! ,