Coaster, really sorry to hear you're having a bad time. I have worked in MH for 20 years and suffer from anxiety and depression, although I'm doing much better since I stopped drinking four years ago.
I think you need to be a bit proactive, and get some additional support in place. Talk to your GP or midwife about how you're feeling. They can look at meds to support you that are safer to take during pg, they can refer you to specialist midwives and hopefully stop a complete crash. Please do this as soon as possible.
You can do some things to help yourself, and sorry if you know all of this. Download some mindfulness meditation exercises from YouTube. There are some that are specifically about thoughts and feelings. Plug in some headphones and try to follow the exercises. You can also find some self-help resources designed with anxiety in mind. I've used the Lindon Method before, and have a copy available if you're interested. A good website for women who drink as a crutch is Soberistas. Worth a look.
Please remember that what you are feeling is being triggered by the chemicals and hormones in your body going a bit bonkers. One set of chemicals has been removed, another few added and you haven't got booze to cushion any of it. It's not surprising, or your fault, just your body trying to work out how to cope.
I hope this is helpful. If not, that is absolutely fine, you may need to find your own way, but please don't just sit back and let it wash over you.
Please feel free to pm me. Good luck x