fertility Dr appointment and jealous dog

Esperanza
Ok so for about 2 years me and my fiancé have been trying to conceive, we officially have a fertility appointment for me to go in and have everything assessed as well as him. This appointment is June 9th and we are both nervous but beyond excited. The other thing is I have a deep gut feeling that this year will be he year we finally conceive. Anyway.... about 1.5 years ago I adopted a pit bull pup he had a rough life. Recently he's been wayyyyyyyy jealous and doesn't like me being touched by my fiancé lol he lays right on top of me as if saying no. He lets him touch him but not me lol he's been like this since ovulation two days ago. I'm starting to wonder if dogs can sense that their attention is being taken away for a new baby or if they just know all together and become protective in preparation of a new baby? Anyone?