I am not one to generally recommend this route, but might a course of AntiDepressants help you back onto an even keel?
I only say this as one of my best friends has been through a very similar-sounding time, and despite practical help, counselling etc, it wasn't until 2 years of misery later, she plucked up courage and went to the GP and he gave her some mild ADs.
The effect was incredible; in 2 months she was a different person. She took them for a while and they helped her cope better, as she was more in control of her emotions and not screaming and shouting at her boys, which in turn, meant they were reacting better to her - and the trauma of dad moving out etc.
If this is not for you, I apologise for the suggestion. Put yourself back on the GP counselling waiting list as well. Also, have a look and see if there is any low-cost counselling in your area. (in my town the local Council for Voluntary Services has information on most services, including a free counselling service) available, so that might be a good place to start.
Explain the situation to your friends/family so they know what you are going through and don't be afraid to ask for help/emotional support from them; take it from me, as the 'friend', it was much better knowing how she was really feeling, than the 'brittle' ''I'm fine, just fine'', then watching her slowly disintegrate, falling out with friends without us knowing what was really happening, how she was feeling and why she was behaving so 'badly'.
I hope this long ramble makes sense; I do wish you best of luck, strength and future happiness restored