fur baby's intuition?!

This is my husband and I of almost five years. We just started trying for a baby. I ovulated a few weeks ago. I was starting to have some different symptoms around the time that in plantation would have occurred (mostly discharge that I have never experienced and constipation). Our dog has never really sniffed my crotch but this week has been sniffing like crazy. Is it possible I smell different because I am pregnant? Anyone else ever experienced this? Or am I just reading into things?