What mental health issue do I have?

So most days I’m pretty down like depression or numb I should say. I also have these days randomly where I am super angry/cranky I lash out a lot. I have a hard time connecting with certain feelings but other stuff I’m like super emotional about. Around 5 years ago I was super sensitive and very caring. After my divorce I became detached from emotions from things. I felt like I went through all the emotions and was super ready for my divorce. I have noticed now a huge difference in my anger and just my not so caring attitude and I don’t know how to fix it. Why is my first emotion anger? I just feel bleh all the time and have had a hard time getting out of it as to where before I was so caring and loving. Like what happened?I cannot get back to that person over night and it’s left me feeling weird. I’m scared of my emotional detachment to important things but like for example I will see a video of a baby and just start crying and super emotional because it reminds me of when my kids were born. I’m asking this because my dr prescribed me Zoloft for ppd and I’m wondering if just depression meds will work or I have deeper issues? Also some recommendations on things? Like what do you think!?