When to call the Doctor after BFP?


Hi ladies, I had my BFP last week and am trying to figure out when best to call the doctor. I have the added complication of being overseas civilian working on a Navy base so all of my pregnancy care will be with Japanese caregivers. I'm 4w5d and don't think they'll see me till 7-8w... should I call now or wait a few more weeks? How long did you all wait to call? Thank you!