hey mama....i didn't have anxiety during my pregnancy, but serious depression i think....i did take medication prior to my pregancy for this (zoloft) and continued throughout pregnancy...not everyone want to go the medication route, but for me it helps tremendously
only advice i have is talk to your dr...also...you have lots of hormones right now, sometimes getting outside for a walk helps with anxiety.....
one thing i can tell you is that just because you're experiencing this right now doesn't mean you will continue after pregnancy....because i was depressed during....i thought for sure i'd have postpartum depression....and i didn't
at one time in my life, (not while pregnant) i used to have panic attacks in the middle of the night...panic in the middle of the night is the worst...i felt alone and trapped and crazy or afraid i would go crazy....weird stuff, girlfriend, weird stuff!
get out of bed...step outside the door get some fresh air....you can take control of the situation....staying where you are just escalates the feelings....and remember....you really aren't the only person up and awake in the world at that time...i used to think about all the people up and about that work the night shifts at the grocery, gas station, etc.....it helped me to not feel so alone...definitely do something you find enjoyable to distract you....have a little project going or a good juicy fluffy book that you can get distracted by to take your mind off of feeling overwhelmed and suffocated or whatever...if you don't want to get out of bed...have a book right at your bedside that you can grab asap and dive into before you dive into your scarry thoughts...
also...when i was having trouble with the anxiety attacks in the middle of the night...i started excercising (just walking) during the day and i slept way better at night....i know that is realllllly hard when you have kids AND when your pregnant....but anything you can do to get your body a little circulation will help you sleep better at night....
good luck....remember the feelings you have are FEELINGS....it's not fact or reality....they will pass as quickly as they came....
good luck mama, you are not alone!