ADD teenage girl tips or experience

Hi my daughter has presented with what appears to be ADD and some autism traits. She is awaiting a diagnosis. 

She has been suffering what we thought was anxiety since around 11 years old with different behaviour such as not speaking to the teacher for over 8 months, refusing to do sport in comprehensive, lacking empathy, not getting jokes sarcasm . appearing to have no emotion. Lacking forward planning or awareness of timekeeping. appearing depressed and wont leave her room other than showers/food but would go to school where she underperformed  we think now due to lack of ability to concentrate and has a lot of the ADD traits. 

We have always had issues with leaving the house on time for social or appts frequently being late or her refusing to go at the last minute and not understanding why only saying " I dont know" This causes the most issues as we miss appts such as opticians family gatherings etc 

I wondered if this rang bells with any other parents of teenage girls and what help or tips you may have ?

thanks

Dave