Hiya op....first of all 💐 for you.
I have been there. I was 17w when I had mine. I had a child who was 2 at the time. I found out very late that I was pregnant (15w, failed contraception) I knew that I couldn't cope with another; DP knew he couldn't cope with another.
I went to the first appt with an open mind but deep down I knew, I think, it was the right decision. I had the surgical booked for just under 2 weeks later, absolutely certain it was the right decision.
Those two weeks were absolutely horrendous. Awful. I was having night terrors, intrusive thoughts, my brain was going into utter overdrive, it was honestly an awful experience.
Once I arrived for the termination and the process began it was nerve wracking, a bit scary maybe, sad; lots of different feelings. However once I came round from the anaesthetic it was like a weight had been lifted.
I felt instantly better. I had more clarity than I'd had for the previous week's and could think clearly. It was the right decision for us.
You are welcome to PM me if you like.