Hi, I can totally sympathise as I too suffered from panic attacks and general anxiety after my son was born. It was a frustrating and confusing time, which I'm relieved to say is now in the past although not forgotten.
At the time I had a wonderful GP at the Thurleigh Road surgery who after some sole searching on my side prescribed me anti- depressants. CBT sessions also helped me look at what was happening to me in a more logical fashion, which definitely helped.
Since recovering and having had my second child, I now volunteer for a charity local to the Clapham area called The Association for post natal illness:
http://apni.org
Please do contact them for help and advice - they really do do a wonderful job. They can also put you in contact with a volunteer counsellor, such as myself, who has recovered from a similar type of anxiety/ panic attacks to yours. Talking to another person with similar experiences is both reassuring and a really positive step towards recovery.
I really hope you soon feel more like you. And remember this will not be forever, you will recover!
X