You might be having some underlying systemic issue which is causing tiredness or you may be short on quality sleep. Voice might have changed due to vocal overuse and abuse. Get yourself evaluated by a physician and an ENT Surgeon ( for voice change). You need to rest your voice meanwhile. Speak only when necessary and don’t shout or whisper.

Voice rest is needed. Consult a ent surgeon for evaluation

U may need to do a laryngoscopy to  confirm if you have nodule or any  other pathology.. Give voice rest and good vocal hygiene