PA medical card

Hey there- I was wondering if anyone on here has a PA medical card and if so the process they went through to get it and how it works. I’ve been googling so much but I’ve gotten confused. I’ve been diagnosed with PTSD and wanted to apply for a card once I give birth- can anyone share their stories or advice ? Can my job fire me if I have a card and they test me ? What is PA selling- I’ve seen no flower but then flower ? Much appreciated.