If My last period date is 05 Jan, so how many week is there till today

And when should be first ultrasound held?

Hi you have already completed 6 weeks, you should have a scan now to confirm the cardiac activity of the baby.

Today I made an ultrasound as prescribed by my Gyane doctor. But who has done my ultrasound he told me that it is too early for ultrasound. Why r u doing...
M still confused.