Why does the orange dot show up when I try to make a phone call? plus my call does not go through. What is going on?

no idea why the call doesn't go thru.. but the orange dot shows up because your are trying to make a call and the microphone would be used to do so.

About the orange and green indicators in your iPhone status bar - Apple Support

I never had an orange dot appear every single time I’m making or receiving a call. Why did it start and how can I get rid of it?

You can't get rid of it.