Is It Normal For A 15 Year Old To Forget

Is it normal for a 15 year old to forget many things? I use sticky notes and a note pad on my phone etc. in order to remember to do stuff. I zone out during conversations and during classes fairly often which leads to me missing important information which is very frustrating. I have not been diagnosed with any mental disorders but my mother has OCD, dyslexia, and ADHD and I have shown traits of OCD before.