I’m having a really hard time

So me and my puppy have grown very attached to each other probably more me then him. My mom, sister, and I are planning on going to visit my grandma for a week and I want to be excited but I’m literally dreading having to go because I’ll have to leave him. I have lost 3 dogs to coyotes and we have taken extra cautious measures to make sure this doesn’t happen again. He will be staying with my dad who can care for him but not to the extent that I do to make sure he doesn’t step a foot outside all night. This trip has caused me so much loss of sleep, moodiness, and tears it doesn’t even feel worth going to. I want to take him with us but my mother is refusing to let me ask my grandma because he’s not fully potty trained yet I’m really not sure what to do!