US making me nervous...What do you think??

So I went for an early US last Fri. My actual appointment is August 15, but I was spotting a little bit of very light pink and brown so I called and he told me to come in.

According to due date calculators on all of the apps, I was 6w5d. But when he measured it on the screen he said it was six weeks exactly. He asked if maybe my cycles aren't regular, but they're pretty regular (anywhere from 27-30 days).

Should I be concerned??

He also did say though that my right ovary looks good and it's implanted in the uterus so it's a "good" pregnancy.

No heartbeat was heard or seen yet but he told me that it still might be a little early. I'm hoping he wasn't saying this to not make me upset?...

I'm freaking out and can't wait until the 15th!!!!