From bad to worse - wake up call?

So... the days slowly roll into weeks and weeks into a month.
 
It has almost been a month since i found out i was pregnant. The joy and peace i found that day was something i had been craving for months. Our family was to be on brother or sister larger...
 
Like a wild untamed horse, that is how i describe my emotions lately and I'm ashamed to say that last night i let it get the best of me.  As if things weren't bad enough, i lashed out at my 5 year old son, gave him a hiding for not listening and had a huge fight with my husband about confronting me about it. I had had it!
But sitting there seeing my husband fume at me, looking down on me as if i was a monster and seeing my son crying in his bed, was as bad as a stab to the heart. I was so ashamed of myself. I scooped up my son, apologized profusely and fell asleep with him in my arms. My husband i have since made peace but he is as mad as a bear with a sore tooth. 
I need to get out of this funk. I need to find positivity, peace and restore it in my family. This is driving me insane and us apart.
How to do this? I don't know... Day at a time? No. Its more like hour for hour.