First Doctors Appointment

Tomorrow (or today cause it's past midnight now) I have my first appointment with my GP, according to Glow I am 7 weeks 1 day (as it is now after midnight) and I was just wondering if anyone knew what would be happening at this appointment? I know my doctor said he would be taking my blood pressure and stuff, and he asked me for a urine sample but I have no bottle to pee in haha! 

Is there anything I should know or do in preparation for the appointment? Anything I need to tell the doctor?