This is strange and I am crazy. I realize this. What have your experiences been with your dog while you were pregnant, specifically in the early part?

I had a couple of days of cramps around when implantation would have probably occurred, so I thought it could be possible I was pregnant. A few other things that could have been symptoms, or could have been nothing. Nothing out of the ordinary. I tested twice earlier than I should have, I know I couldnt help it. My period is due in 3 days. When I visited my parents today (moved out about a year ago), my dog of 14 years came up for me to pet her, which is nothing unusual. I was squatted down and she started sniffing, uhm.. down there. And then she started rubbing her head all over me and my legs. Then she literally buried herself up under me. It was SO strange. She has NEVER EVER done anything like that! So now I've been reading all these stories of dogs acting weird around pregnant women. What's everyone's experiences?