How do I go about getting help ?

Im suffering painfully from idk it could be post partum depression, but then again ive always been on some kind of cycle of feeling hopeless and having no self drive at times then other times im on top of the world only to crash. Whatever the problem might be its debilitating my life. I can no longer control my emotions anymore and its becoming public. I no longer want to go out or deal with people i hyperventilate even over a phone call. I dont know how to get help with a newborn that im exclusively breastfeeding