It's great you've got that book.
This can be your first PST (Positive sleep thought):
"Now I have bought this book i am on the road to sleeping well again" - write it down!
You will be writing a lot more PSTs like these.
I know, it is SO frustrating - when your body needs something so badly but just will not let you have it. It's like a war going on inside your head. You need it, you want it but you can't have it.
In your case you are fortunate in that you are in your second trimester the baby has done all it's forming (first trimester) and is now just growing. So it's less risky in terms of taking something drug-wise. The fact you are not in yuor third trimester is also good as there is little chance of withdrawal symptoms in your baby once he / she is born.
so don't beat yourself up if you do end up having to take something. Honestly, getting sleep now is more important to you and your baby than anything else. Helping yourself IS helping your baby right now. Perinatal services will be able to advice you of pills that carry the least risk. From what I've read, zopiclone is probably the best choice. Benzos are to be avoided if possible.
I totally know what you mean about being unable to function. When I was at my worst, my speech was slowed and I could barely lift up my head. I just totally shut down, physically and mentally.
You have to keep telling yourself you will get through this. And it's not just saying it, you WILL get through it! I really thought it would be the death of me, but I came through it. Yes, I still have the occasional wobble but I am much much better than I was. This is my first episode in about 6 months now.
It's so hard on you that your partner is away. You must be feeling very scared and lonely. Is there a friend or family member nearby that could come and stay for a few days to look after you, or even just pop in and cook you some dinner? You need to look after yourself, and if you are like me, you probably won't be. You need to gather people around you. But i do understand that when you are in such a state you can hardly even organise breakfast, let alone people.
It is really tough right now, but you will come through it. It's easy to give advice I know, but I have been there, and am going through it right now too, so am saying it as much to myself as to you.
Hope you got first class delivery on your book Take care.xx