Good day to all.
I would like to ask for your opinions please
My dog (Goldador 2 5 y.o) has had 2 good ties in beginning of July and was ovulating at the time.
She is more attention seeking and slightly off her food and can't stop eating at same time. She is resting most of the day  which is totally opposite of her character. She has had small weight gain.  Her nipples are slightly pink and her vulva is still swollen.
We just have had scan, however it was negative.
We all were soo excited,  but am wondering if she could be slightly behind in her pregnancy. 
Note to mention it would be her first pregnancy

Correction on age is 2.5 years old. Mating was on her 3rd season

Was the scan done by someone who does it all the time or by your vet who don't do them very regularly?

Scan was done by lady privately.  She came in highly recommended.
She was trying in different positions.  Lying down, upright and standing normally.

How many days after the mating did you scan? 28 days is the absolute minimum, but if there's nothing visible on a 35-day scan (dog standing normally, no need for any strange positions!) then she's probably empty.

It was about 30 days

>It was about 30 days

I'd rescan in a week.

Thank you. Booked for 28th, which is closer to due date, so we would def know if she is. We could always cancel if required