Every pregnancy is different, and symptoms do come and go at the beginning. Statistically, it is very likely that everything is fine. But I understand how worrying it feels, particularly as it was so bad last time, and you have had some days of proper symptoms.
It’s such a weird feeling, wanting symptoms. All of my early good days were marred with “is my baby dead?”, and all of the bad ones with feeling dreadful.
I’m in roughly the same area as you (Chesterfield isn’t my closest hospital, but I’m booked in there), and I’m impressed that you managed to find such a cheap early scan! When I was worried in early pregnancy, I wasn’t able to find anything nearly so cheap. (Had a suspected ectopic, so the doctor sent me off for a scan, in the end, which very much put my mind at ease on the baby’s position, and gave me fleeting reassurance that it seemed to be alive at the time, but that reassurance fades over time! Still, knowing it wasn’t going to kill me accidentally was nice.)
I hope that everything goes well for you, and that it just happens to be that your body is handling pregnancy much better this time.