A blood test will be performed
I told the OB I took two test that were positive and I was a week late for my period. They gave me my first ultrasound at 5 weeks, told me my expected due date and gave me prenatal vitamins.
When i called to make my first appt i told them that i had 5 positive tests lol and the nurse said well you are definitely pregnant so there was no reason for me to go in and take a test there. They scheduled my first appt for 8 weeks and were able to see my baby with an ultrasound. Most dr wait a few weeks before the first appt but start your prenatals now!
They will be able to detect if you are pregnant in the ultrasound because they know what to look for you should make your appointment so you van start your prenatal care
They did my first ultrasound at 7 weeks.
You still need to go to the doctor they won't do an ultrasound until you are about 8-9 weeks anyways