What do I do?

I have been having this weird throbbing after peeing, I don’t know what it is, but I can’t go to the doctor for it. Is there any way to help it without going to the doctor? My parents yelled at me for not realizing I was dehydrated in the past ( I was actively trying to drink more water but it wasn’t enough) so I’m worried if there is something wrong they could get mad at me again. It’s less intense when I drink more water so I’ve been trying to drink as much as I can. I know it’s not a std or sti. What do I do?