How to fix vocal straining and problems?

Hey guys, I make youtube videos where i do voice over and i need some help with some vocal problems. my voice gets REALLY strained, like half way through the day i sound like a different person. It gets super coarse, rough and sometimes nasally. the only time i can record for my videos is in the morning as I feel like after that my voice just sounds unbearable.

its weird because ive never noticed it before but now im trying to record it gets bad, its really making it hard to put out content as sometimes i just feel like im not able to record. I need some help on how to get around this, have any of you got any tips on how to get a clearer voice or have suffered with similar issues?