So glad you made it back so quickly.
My friend at AA did pretty much exactly the same as you at about 5 months sobriety. At the time she felt guilty; ashamed; angry with herself; etc. Now, seven months later she says that she's glad it happened as it really reinforced it to her that she CANNOT have one drink. She IS and alcoholic. And she has no intention of letting this disease take away all the things she's worked to get back. (Respect for herself; positive relationship with her ex; her health; her ability to be a wonderful mum to her two children; etc.) It was a huge and scary lesson, but one that she has chosen to reinforce her future sobriety.
Wishing you all the best for your future sobriety - it sounds like you're in a good frame of mind to get back to it right now.