Hello, 

I'm 38 so also young, I am not sure if you can take someone with you I think you should if you can even if they wait in the car,, not too worry you but always nice too have someone not far away.

you will see a Consultant first who will chat to you then they will look at your Breast and will mark the area with pen. 
 

you will then go to get an ultrasound, if they think it's a good idea they will send you for a Mammogram, and possible a Biopsy if it need further testing. 
 

Try not to worry it's the best thing that you are going too get it checked, likely hood is it's nothing. The waiting for appointments and results is the worst. 
 

I hope it goes well and you get positive results.

love Sarah