Pcos or pregnant

hope
So I had a period last month but didn't start this month me and my boyfriend had unprotected sex a week before my period so I went to my obgyn and she did a urine test and vaginal ultrasound and no baby... If I'm pregnant I'm only a week exact ..my Dr told me I had the beggining of pcos that's y I didn't start but I believe I'm pregnant ..I went not even 2 months ago to have my mirena removed and they did a ultrasound then and never said anything about me having pcos what's y'all opinion?should I see another Dr in a few weeks??I'm a little nervous