Anxiety when working out

Yeah, it's, I don't know what it is actually. Started working out, kinda realized the way I "use" my body is kinda fucked up, so I started healing myself, getting stronger and etc. But I'm having some kind of imposter syndrome or something, I think because it feels like "not me", I'm not worth it, or it's too different, I'm not sure. Has anyone else had this, tell me if you did please, because this anxious feeling.. i don't know what to do with it. I know I shouldn't stop, I feel healthier, I get better at not getting injured, but it's weird. I even started to chew and breathe different, all good right (less strain on my ears, building good stamina, energy), but my face is starting to look different... I feel like a different person. It's something

Thanks for the read