Feel like the shittiest dog mom

I'm 36 weeks pregnant and this weekend I haven't paid as close attention to our dog as I usually do, after getting some bad news about our baby, which has left me upset and sad. I've noticed he's been grooming his feet more than usual, but didn't think much of it, and today when I was going to clip his claws I saw one of his toes has at least doubled in size and his nail feels a bit loose and I feel so shitty for not noticing it earlier . I'm calling our vet first thing in the morning tomorrow. He doesn't show any signs of pain, but then he's a terrier. My anxiety is through the roof. 😭