Pug going nuts: in labour soon?

La

Our dog is acting very weirdly since two days: he’s extremely nervous and not sleeping as usual, suddenly barking even at non- existing noise, staring at us while we think he’s just sleeping on the couch. Is he possessed or could he be sensing the start of labour soon? He’s making me freak out too. LOL

I then read on the internet that dogs can sense lots of things coming that we can’t.