I don't know what's happening with me

I have been happy/content with my life until now; my days just goes as social media, look at memes laugh and hangout with family but I always have had social anxiety . This month I have been getting hit by random burst of sadness and anxiety and for the first time in my life I have experienced and been having panic attacks. I would just have breakdowns and cry randomly. It feels as if the force of a waterfall is coming down on me like all my regrets and mistakes is hitting me. I know I am not like my usual self these past few days and I don't know why. I want to do my hobbies and work but I don't have motivation, energy, and interest to do them I would just open up my phone to distract myself and then cry. I don't know why.