Early pregnancy scan help

Hey everyone, I found out I am pregnant (about 7 weeks but it could be a little earlier) and have an early pregnancy scan booked for Monday morning. Do I need to go with a full bladder? I’m worried I’ll do the wrong thing and won’t be seen, there’s been no answer on the phone all day and I’ve only found conflicting info online.

If it makes a difference I’m having an early scan due to diabetes. Thanks for your help.