Apple Watch issues

I have had my Apple Watch Series 3 for almost 2 years. I use it to mainly to workout. I did a workout at my pool and my watch started acting up during my workout, so I got out of the pool and tried to eject the water out of it because I thought maybe that was the issue. It ejected water but still was acting funny, so I just took it off because I didn't want to take it back into the water with me. I put my watch back on and on my drive home, the bottom started to burn my wrist really badly so I took it off. I had a red circle from the burning on my wrist for a day or two after it happened. I haven't been able to turn my watch back on since. I have tried to charge it, but nothing is working. I also see a blue outline around my screen. If anyone could help me out, that would be great!