i feel dissociated

guys , im in this phase that i dont feel like myself my brain doesn’t work , i cant process any feelings anymore of me or others i forgot how i lived before this phase i cant do the things i love , or even think about it i just dont have any motivation to even think about anything i feel everything in my bodu , my bones hurt and i feel like my brain is heavy but i also feel empty and numb about everything i dont know who im anymore or what should i think about or anything do anyone went through this? is it dissociation or what ? and what did you do?