Depressed or Just Crazy ?

Can I have postpartum depression now ? My baby just turned 5 months and I'm very depressed stressed and everything else. I'm very mean to my S/O even to the point where I broke up with him because he irritates me so much I feel so unloved besides from my children. I feel like my feelings don't matter and that I'm not good enough I cry everyday just out of the blue and I'm either angry or sad is this depression or am I Just tripping ?