
I'm one of those people that never have scans. They are either pregnant, or they're not, and it isn't that long a wait to find out.
I often don't feel movement until the last week. I once had a bitch that I could feel no movement at all until the day before she whelped, when I actually watched as they moved down from under the ribcage.
If I've had a bitch mated, she is always treated as if she's pregnant, wormed from day 40, changed to puppy food towards the end of gestation etc.
Don't worry too much about not feeling movement. I'm sure that if there were any problems with your girl, you would have noticed that something wasn't quite right.
The truth is, the little b*****s like to keep us guessing, and it's a bonus if they can stop us sleeping at night, while we worry about them! :-) :-)