[Kona]

When is the earliest you can tell if a yorkie is pregnant? Kona went through her heat during the beginning to middle of Feb. We didn't see them tie, but we have seen slight changes in Kona. I know many people don't go to the vet for ex-rays until a few days before the due date... but could a vet tell ahead of time? Are there any noticeable signs? We have a trip planned in April, but I am thinking of canceling it on the incase that she is pregnant.

Thanks in advance for your responses!