Ovarian cysts

Hi I'm almost 6 weeks pregnant and was told 2 weeks ago by an obgyn that i had ovarian cysts on my left ovary and that it's twice as big as the right one, he told me that it was nothing to worry about but that office was very unprofessional and even told me that i was 8 weeks and put tht on the ultrasound when in reality I was only 4 weeks at the time so I don't know if I should trust him ! My next appointment is in a month in a way more professional office.

Edit: I have regular periods and only took me 3 months to get pregnant...