Help me God (or old me)

I had an intervention. My mom stormed into my room, really pissed off because I'm not ok. And the worst part is, I was crying - some sad song about break up. I couldn't tell her I'm actually ok. That I more and more feel like and old me. Bold, confident, determined, satisfied. She was screaming how I need to change everything. How I need to say f off to everyone and everything and go back to that person who was laughing and dancing and wanted to do everything. How can I explain to her that I lost myself entirely?! That I'm fucking upset because I know I'm not ok and that I don't have enough strenght to fight?! Yes, I want to dance all day long, I want to eat, I want to cook again, I want to make plans, to be happy about the future. I want to feel myself, I want to see colors, I want to run from one place to another and to make people happy because I know to shine like the Sun. I see fragments of that old Sandra. I see that smile, and that wondering faces of others asking who's that girl. But I want to shine for myself. I want to shine again!
I also know deep down inside of me that things have to go slowly. That I have to be sad when I'm sad, that I have to be angry and lost for now. I just need to accept it. I know I'll be ok. I have that strong feeling that I'll be ok. I know it! But can I let myself to be heartbroken for a day or two?