fallen-yoshi's journey

I'm currently 18 years old and working my first part-time job in retail. Unfortunately, I've received three write-ups for being short on my register, especially during my first few days when I was still learning the ropes. I suspect I might have undiagnosed ADHD, which contributes to my difficulty with focus and counting. Recently, I received another write-up for being short again, just barely over the limit. I'm really anxious about the possibility of getting fired, especially since I have another job interview lined up that I hope will work out. If I do get fired, I'm worried about how it will affect my future job prospects and interviews, particularly for part-time roles. I really need to keep earning money to cover my new car expenses and insurance. I've heard from others that I don't necessarily have to disclose being fired or even include that job on my resume, but I'm still feeling scared about the whole situation. Any advice would be greatly appreciated.