My scan showed only a sac (well, at least to my eyes - although they could've detected something more) and I had mine the week after. Think I was about 6/7 weeks though.
You are not mad. You do seem to have extremely high anxiety, which is probably worse as you've not got your husband or close family nearby. I think you should discuss your anxiety with a GP and maybe write a letter so it's easier to explain how you've been feeling.
Honestly, you will have an abortion. It is your total right and they won't stop you at all! So don't worry about that.
Mine was a few years ago and I read the horror stories beforehand too!
Here's my honest and realistic account of what actually happened:
I went to the clinic the first day and they gave me a suppository thing that I had to insert to start softening the womb or something.
I think I may have had a little spotting, but I don't remember any particular symptoms that night. Then I went home and returned the following day to take the pills orally with the nurse, and was sent home for things to occur as I had my husband at home with me. They also gave me painkillers for the cramps and antibiotics for afterwards to prevent infection.
It was an hour train ride back from the clinic, I think, and just before getting to our home station and getting in the car I started to feel period-like cramps. This was probably two-four hours after taking the oral tablet.
By the time I got home I was experiencing some painful period-like cramps and bleeding and just sat on the sofa in a blanket. After an hour or so of this I took the painkillers they gave me, I felt the urge to sit on the loo and was sick a couple of times (apparently the pills can have this effect) and passed the pregnancy.
Almost straightaway the cramps got better and were much more bearable! I was tired and felt crap, but the whole process was only a few hours. I bled for a couple of weeks after, but felt fine.
There was some guilt, but mostly relief to be honest. You can feel how you want to feel. You are not selfish and it's not the crazy experience people online make it out to be. It's unpleasant and hurts, but it's quick and you'll be under medical supervision too (I was at home and probably would've preferred to be in hospital as I could've asked nurses questions etc.)
Hope this helps a bit in giving a realistic and not sensational account of what it's like!
Hang in there and do go and see your GP to help manage your anxiety.