Were you able to get some sleep tonight? I'm sorry you're having to deal with this and that your toddler is ill.
Do you have any Alanon meetings nearby? Sounds like maybe some in person contact from those who understand could be useful.
Baby steps. Breath deeply. It sounds like you're having some very natural reactions to this.
Maybe your own words can help? http://www.soberrecovery.com/forums/...l-today-_.html
Was he really looking for help - AA, a licensed addictions counselor, rehab, a detox center, etc. and wanting a ride there - or is he looking for his drape? Is he wanting you back so he can supposedly be okay?
What's helped me when I'm tailspinning is prayer, writing down a list of things I'm thankful for, and writing down a few simple things I can control.