Worse, it can lead to more voice problems and long-term vocal damage that could affect your work as a singer. In addition, there are days of bad voice (in fact, I'm there right now, I used my voice too much and I'm paying for it now). Sometimes, for reasons totally beyond your control, your voice just doesn't cooperate. Things like allergies, fatigue, diet or even the weather can make your voice go crazy.
So that can also be part of the problem, you might want to try recording again just to see if you need a fresh day and a new perspective. Hopefully, you can use this list of 10 reasons to find out which one applies to you. For example, I've been working on the song Johanna by Sweeney Todd for a while, and I chose the song specifically because it's hard to sing and I thought it would help me improve singing. However, for singing, even benign polyps of the vocal cords can adversely affect the singing voice.
That's not how singing works if you're serious about singing, then you have to practice every day, or every other day if you don't have more time to do it. Being confident in your singing ability will help you a lot, especially if you're coming out of a period when you can't sing well. The main reason you're getting worse singing is that you don't have consistency in your singing practices. The reasons you're getting worse singing are because you don't have consistency, you practice aimlessly, you change your daily routine, you don't hydrate, you sing too much, you focus on the wrong things, you get bad habits, you try too hard, you don't listen to advice, you're getting old, and because of a medical condition.
This may not be relevant to your situation, but in my case, before starting to study various concepts of singing in greater detail, I would just sing random songs, press for notes, etc. Singing is quite stressful for your child, especially if he is a beginner singer, and if he does not allow his body to rest and repair all the damage, then your singing will only get worse. There are many extremely determined singers who practice singing no matter what, but if you're at a point where your throat hurts while you sing, you're probably overreacting. I really want to be good at singing, and I practice almost every day, because I realized that singing is something I love, and if I can find a way, I want to do it for a career, so I try to be as positive as possible about my singing and my improvement, but sometimes it can be difficult and I can't help but I get discouraged, which sucks because I KNOW I need to be positive.