Hi there, healthy choices. Take a step back, and take a couple of deep breaths.
Are you sure you're not going to act on your impulses there? Maybe you should consider calling a suicide hotline - just to talk through things? At least look up a number and keep it close.
Mood swings are fairly common in early sobriety, as is anxiety. I was all over the place the first few weeks.
Seeing a doctor about how you're feeling seems like a good idea. It may not be a prescription you need - a referral to a psychologist might also help. Someone to talk through getting sober, recovering, breaking up your relationship, dealing with the new pup ... that's a fair bit of stuff going on, and some help from a mental health professional may be just what you need.
As for right now, if staying close to SR helps you, then do that; post, share how you're feeling, and accept the help from the good people here.
Also, is there anyone in real life you might be able to reach out to who can be a support?