I was in your exact spot last year. In May I ended a relationship, my very close aunt was diagnosed with cancer and then died. I was still seeing my ex which was hard as I still wanted to be with him, even though I knew it wasn't going to work. We were my aunt's only family so we had to clean her house. I spent 11 weekends cleaning out the house. It was very hard to do. I also had to face the fact that my parent's were getting older and my dad, who just turned 85 was losing his memory. It was a chore to get up in the morning. All I wanted to do was stay in bed and pull the covers over my head. I cried almost every day. I kept telling myself that this would not defeat me and it didn't.
While I was going through this, I kept asking for help, not really to anyone but myself. I had realizations along the way and what I realized was the I was grieving. Grieving the lost relationship, misconceptions of myself, my aunt and my carefree life (as I realized that I had to focus more on my parents now). These realizations helped but it took a long while, from May until January really.
What also helped was to find something to challenge me. I started running in October and planned to do 2 races in February and April. It gave me something to focus on and a different challenge. It worked and I started to feel like myself again, only a better self.
I agree with talking to someone, but I disagree with taking meds. What you are going through is called life. It is during these dark times that we find our true selves and it will lead to a greater understanding of who we are.
You lost something, a relationship, expectations. You need to grieve. In time you will come to realizations and you will get stronger and feel like you again, only you will be a better you.
Please don't give up. Talk to someone that you trust. Talking helps. Take long walks and ask yourself for help. If you listen, you will find the answers.
Good Luck!