Should I relax my voice now?

Okay well I guess since I'm worried, freaked out, and anxious I've been forcing myself too much in singing. I have something coming up 2 days. So I'm choosing to relax my voice, because if I overwork it I might sound fatigue, and who knows what else. Any really good relaxation exercises? or any remedy to relax the throat? Please anything will help! I want my voice to be healthy on time....