Wow, just reading your thread through and the main thing I’ve noticed is how brave youve been.
You should take a moment to give yourself a huge (but gentle!) pat on the back for what you managed to accomplish these last few weeks.
You overcame a massive barrier to go to the GP, and then to have to go back to a hospital where you have all those traumatic memories stuck into the walls and floors there... soaked into the bricks and mortar. And you didn’t screw up your courage and manage to go once, you had to go back again and I know how ruddy hard that is. To have all that fear in you, from all these different sources, past & present, and you were strong enough to go back and go through another unpleasant scan and docs appointments and all of that stuff...
I am serious. You’ve been so brave. Super hero lady! 
I think it’s easy to compare yourself with other people who don’t have any of the same past experiences as yourself, and think, ‘they look like they’re doing it easily, so I’m rubbish if I cant’ and then that just adds to the fear and shame and worry... but the thing is, you have so much more to drag with you, and to struggle through to get to that same appointment and do that same thing (& besides, just because someone looks like they’re finding something soooo easy, doesn’t mean they really are on the inside!).
Anyway, I really mean it, well done. Bloody hard work and you went straight through it all, and phew, now you know there’s no serious underlying cause. Well done. Yay!