My first thought was how old are your twin daughters? This may be to do with being a new (newish mum) - in some cases of anxiety you can work your life around it, like if your anxiety is caused by high mountains - keep away from them but if its more general then I would suggest:
1) talk to me about your daughters age & activities & when the anxiety attacks occur.
2) try 5htp (tryptophan 50-100 mg at night) you can google this & get a full explanation of why I suggest this.
3) sam-e may also help as may dhea (12.5 mg am) also valerian, vitamin b's &
4) meditation &/or relaxation but these you need to learn & practise before they can do any good. Also the natural /vitamin & drug therapies above will take 2-6 weeks to get working.