newname My heart goes out to you. My Dh and I planned our first DC and got a BFP second month of trying. I reacted just as you are saying you are now - possibly worse because I recognised I was sliding into a clinical depression (which I suffered from in my early 20s). I was stressed about everything: the size of our house, the impact on dh and I, not being able to travel to see my own family (who live on another continent), our lack of finances, the possibility dh's family would start dominating our lives by visiting grandchild/cousin/neice/nephew etc. I had physical symptoms too: anxiety, palpitations, breathlessness, severe weakness. I thought I'd made the mistake of my life.
I had a MMC discovered at ten weeks and all the physical symptoms disappeared - in fact, I knew it was over before I started bleeding because of the sudden easing of all things related to anxiety. But I did not feel relief at the loss of the child: my devastation was immense even though I felt a lot better - worse I tortured myself that I had subconsciously rejected the baby and that's what caused the MMC. After my MMC, and after the symtoms went, the things I was worrying about seemed trivial in comparison to the loss.
I went to see my GP about all of this AFTER the fact and she referred me to a psychiatrist at a peri-natal mental health unit. I needed to understand why I planned a child, but then felt it was all worng when I was PG. It was an eye-opening meeting. The psych told me that what I'd felt was immensely common; she said she hated society for only depiciting babies and PGs as 'glowing' rosy experiences, and said she saw hundreds of women who experienced it very differently and felt very isolated because they weren't reacting in a so-called 'normal' way. You are def not alone.
But I think it is important you separate whether the feelings you are experiencing are provoked by 'real-life' worries, or whether you don't want the baby - because as I found, there is a difference and its hard to tease it out. I think it would help you a lot to speak to someone - but ask your GP to refer you to someone who deals with PG women (I also saw a psychologist who didn't even know what progeterone was and that did more harm than good).
Finally, just to tell you I got a second BFP some months after my MMC and the same physiucal symptoms happened again - but this time without the worries in my head. After ten years of a high stress candle-at-both-ends kind of job, I think my body couldn't cope with a PG. But with the second BFP, I knew it was my body - not me rejecting it. That the 'anxiety' was a biological response, not one caused by me not wanting the child. I had another MC. But I then spent a year getting fully healthy, cutting down work and stresses, sorting things out, and I am PG again - this time, no worries and no symptoms. It's a very different experience.
I really hope you find your way through this in which ever solution suits you. I totally know what an awful experience it is. But please ask your GP to get you an appointment, urgently, with a proper person, to help you work through this difficult decision.
All the best to you.