When to go to the doctor???

Savannah

I’ve taken 4 at home pregnancy test and they’ve all been positive. I’ve done a <a href="https://play.google.com/store/apps/details?id=com.glow.android.nurture">due date calculator</a> going off the first day of my last period and it showed me at 4 weeks and 6 days and I’m just wondering when should I go to the doctor? My cousin told me to wait until 8 weeks.