Advise needed please 😌

So I dunno if I'm pregnant or not I have been taking test some come up with faint lines and most of them come back as negatives but what's making me curious is my mums dog he normally jumps on me or when he's playful he gets to much as he's a bull dog and normal bites nibbles and all that stuff jumping around me been giddy like any normal puppy but recently he's been very cuddly and not doing any of this anymore but is doing it to everyone else part from my sister who is 31 + weeks gone and my partners dog is never really cuddly with strangers either she's seen me a couple times say about 3 and last time I seen her she was very cuddly too I'm still monitoring my sons behaviour as he's been funny too it's only been 3 weeks since the last sex does anyone have any idea if this could be a pregnant moment or could this be just a coincidenceÂ