If the arm involvement is a new symptom you may need to call your physician.
What you have explained here sounds like anxiety and panic but I am not a professional so I cannot diagnosis.
I used to wake up every morning for weeks and just start crying but I felt more like it was the depression as I just did not know what to do and than the anxiety piece was there too. I was anxious because I was depressed and depressed because of the anxiety which made me feel worthless.
It took many attempts to find the right drug combo and I still feel like it is not perfect. So I know the feeling of waking up in panic mode. I would not even get out of bed as the tears were instant. Just to get up felt like I was moving a mountain.
I wish you peace and hope you have a good physician and/or therapist.
I agree with D, if the nauseous feeling continues, give yourself permission to go home and work on the anxiety and rest.
I used to have severe anxiety just getting ready for work but once there I was okay until the stress of my job responsibilities overwhelmed me and I took early retirement.
So you are not alone, we are here to support you.
Take care of you.
I'm sorry you're going thru this! But I do want you to know that it is pretty common to be more anxious on awakening. Have yu read any of Dr. Claire Weeks books? They are really helpful. The best thing an anxious person can do it to try and face the dreaded situation and wait it out or else they can reinforce the fear. It makes it more complicated though with you being pregnant. Your symptoms sound like classic anxiety but it wouldn't hurt to check with your doc about the pain in the arm.
I know it is TOO easy for me to say what should or shouldn't be done...I was 17 when I got my first job. Worked one day, woke up in the middle of the night with a PA and refused to go back. It took me a couple of years to try again...no good. I'm on disability cuz of it (I'm 42). If I had known then what I know now, my whole life's story might've been different...
Are you on mrds from a pdoc or do you have a therapist? I hope so, although I know you have to be more careful about meds at this stage.
Take care and we're here for you NO MATTER WHAT! ;)