It sounds like you're having a really hard time.
.........but don't worry - there's always a solution to every problem.
Firstly - thrush.
As Candyday says - you both need to be treated for the infection or it will just pass between the 2 of you and never fully go away. So you both need treatment - the correct treatment.
Go to your GP and request Daktarin gel for LO's mouth and Daktarin cream for your nipples. That will treat the external infection. You also need to get a full course of Fluconazole. This will kill off any infection that has made it into your milk ducts. Get hold of some acidophilus (from Holland & Barratt). Start taking it - and continue taking it once the infection clears up as it will then help stop it returning.

In the meantime don't forget it is totally safe for you to take paracetamol to take the edge off the pain.
When you say she cries all day - is this when you try to put her down or when she is away from the breast? If it is either of these things then it is normal. At her age baby just wants to be at the breast. Her job right now is to increase your milk supply to the level she needs in order to get it established.
I think with your OH having gone back to work now you maybe feeling abit overwhelmed by everything?