Do 6 weeks seem too long of an appointnent in between?

So since I'm on my #3 pregnancy (the other two were full terms). I had an appt around 21-22 weeks appt after my anatomy scan. Then had a followup with ob... All is fine. He gave me the option to wait 4 weeks or 6 weeks from my last ob appt... I obviously chose 6 weeks (have 2 kids already under 4yrs that need me too!).

I don't seem too concerned, but is 6 weeks too long? I'll be going back for glucose (then).