Welcome Acey - Im also a little over 7 months sober and have similar feelings and thoughts about my past... It is normal, as far as I can tell, for us to be in this spot as we work toward our first year. I've had a few very intense inner struggles with the ghost of my "past self" coming back to haunt me... I also have some fear, like you, about relapse and loosing it all again. So I guess you could say I relate a great deal!
I'm glad you are here. Sounds like you're on a good path and you expressed gratitude for the blessings you have now so that's great. I also have a great guy and a little one and you're absolutely right - they are such a huge blessing in my life. I would never trade them for a day of drinking and drugging.
Keep coming here and checking in! Thanks for sharing with us.