What’s wrong with me?

I posted a few days ago that I was feeling overwhelmingly sad and I had no idea why. But like now I’m always crying at night. My heart hurts so so bad and nothing tragic has happened to me recently or anything like its been my same old routine for the past 20 years. I just want to love myself and be happy. But no one else seems to think I’m of any importance lol. Like I guess I just don’t matter. Idk. I’m probably over reacting. I’m just so fucking sad I don’t know. 🙃