My Chihuahua

Ericka
So I only found out 5 days ago that I'm pregnant but fir the last 2-3 week's my oldest Chihuahua(3) who normally sleeps on the couch in our bedroom has been sleeping on the floor next to me. He follows me everywhere I go even before I was pregnant but this is strange. He won't even let any of our other dogs near me. Anyone else experience this with their pet?