I suffered from anxiety attacks while tackling a bad bout of depression a few years ago. I was medicated in the end and they helped a lot.

My sister had depression (but not really PND) with her first bubs so she was put on anti depression/anxiety meds prior to having her second almost a year ago. They were a HUGE help for her.

One of my best friends was also suffering from anxiety attacks about a month before having her bubs (only a few months ago now) and after chatting with the hospital shrink, she too was medicated and was so much better for it.

I know medication is not for everyone but I can speak from experience when it comes to anxiety attacks and depression (and they often go hand in hand) and I can highly recommend meds if your doctor/midwife does too. It was the best thing I ever did and I know my sister and my friend feel the same way.

Chat to your midwife again and see if you can have a consult with a pyschologist who specialises in pregnancy related anxiety.

What you're going through is very normal so just get the help you need