This sounds pessimistic, but i personally don't think there's any way to 'manage' borderline moods. there's really nothing (besides medication) that can control the way you feel, and even then all medication does is cover up the moods and dull them down.
what you CAN do is manage how you react to your mood changes. that is where you begin to help yourself.
i've been in therapy for 4 years and the biggest thing i've learned from it since i was diagnosed was how to view my extreme and intense emotions as something other than me.
you are borderline. the most key aspect to your disorder is your extreme emotions. this is part of your disorder. and yes, it does change how you feel and view things. you can't stop feeling what you feel. what you CAN do is rationalize these feelings, put them in perspective, and work on how you react to your mood.
this would be a great bonding opportunity for you and your husband, actually. sit down with him and tell him how you feel and tell him about what happened. tell him how you feel broken and low and how it feels so strongly like that. and write down what you're thinking ('im broken' 'im a horrible wife and mother') on one side of a piece of paper. then have him flip the paper over and rationalize what you're thinking. what's his view on this? how does he perceive this situation? have him write it down.
(this obviously might not work for you but i've found it works with my therapist and my friends) it might help you understand the side of the dilemma you aren't seeing.
please remember that your feeling is not the end of it. he took it well. you are thinking in black and white (another 'fun and cool' borderline symptom

) meaning you are taking this situation and applying it to your entire life. you are NOT a horrible wife and mother. you are NOT horrible and NOT broken. it'll be alright. things will get better even if it definitely doesn't feel like that right now.