Can PPD show up later?

My baby's almost 5 months and I have always struggled but have been good at hiding it. As of lately I have noticed my depression has gotten really bad. I have been thinking about how my family would be better off without me bc all I want to do is sit at home and sleep or eat. I have gained weight since delivery and hate my body even more than ever. I try really hard to hide my sadness but it's started to physically playing a toll on me. I have been suffering from headaches and back aches and seem to push my baby away bc of it. And to top it off, I feel like every time my husband comes home from work I pick fights with him. And I want so badly to stop being a bitch all the time, but everything irritates me. So my question, can PPD show up later, and does what I wrote sound like PPD?