Sore throat after first practice

Hey everyone. Today I was home alone so I decided to try so warmup exercises. However, after about 30 seconds of practice my throat got extremely sore and my voice started to sound very hoarse. I think it's because I have a lot of tension in my throat when singing. How do I fix this? I'll probably relax for a few days to let my throat heal because it feels very raw and sore right now.

Comments
Use these videos to help understand what needs to be done so that you don't hurt your voice again.
Good luck
How is your support going now? I am having the exact same problem. I'm only a couple of weeks in and as soon as I sing through my LAH scales my throat is hurting.
I think I understand the concept of support but still haven't embodied it.