OP I'm so sorry you're going through this right now. It sounds like you feel you've lost control of the situation that you felt had been under control with the c-section.
What your partner wants is nice but I'm afraid for him, irrelevant: it's your body. So while it may sound horrible, put what he wants to the side completely.
Next, your consultant. She is there to inform you of risks so you can make an informed choice. Physically there is the issue of your uterus which you have to be told and advised about. But your sexual abuse history is also physical. It has real physical implications to you today, as well as psychological ones. Is there any way you can speak to your consultant again? A phone call even? Tell her exactly how much this is impacting you and if if you haven't already, tell her why. I have had to talk about something similar when I was scared about giving birth. It's not nice (or fucking fair either!) to have to but it's impacting you so much that she can't give you proper advice unless she knows. And I mean that even if she already knows your abuse history, then she doesn't know what's happening now.
I also wanted to let you know that there are many women who have the fears you do for the same or similar abuse reasons. I'm not trying to minimise what you're feeling. It's more that I want you to know you're really not alone and what you're feeling is completely normal given the circumstances. I'm not suggesting you make any particular decision, but please don't feel bad for how you feel right now. One thing that abuse does is take away our sense of control over our bodies and our ability to advocate for ourselves. It strikes me that right now you have two people who appear to be making decisions about your body and that it could really help you to get some control back by talking to the consultant and putting your DH's wishes aside on this occasion). You're allowed to do whatever works best for you here. You are who matters here, you are the only one giving birth.
The BRAIN acronym may help you in thinking about this and asking questions. It's used by doulas to help women giving birth to figure out what they want when presented with options by midwives/obstetricians, and often given to the birthing partner to use as the mother may not be able to talk or think properly in labour (so could later be useful for your DH to know). I find it's often useful when making health/treatment decisions.
B - benefits - what are the benefits of a c-section and of a vaginal delivery with mental health included?
R - risks - what are the risks of a c-section and of a vaginal delivery without epidural with mental health included?
A - alternatives - what are the alternatives (with epidural, anything else - what are their risks and benefits?)
I - intuition - have a think, by yourself, what do you feel is best for you?
(N - nothing - this is the last one which doesn't apply in this instance, but while you're in labour it would be "What happens if we do nothing for now?")
Don't be afraid of asking anything, including for what you want. And please don't feel shy about telling them how awful you're feeling. You deserve to be taken good care of here. 