I'm a mess of problems. Please help?

Danita

I am 8 do right now.

For the last two days, I've been having cramps (mainly on right side) pulling sensations, and sharp pokes and backache.

It even worried me so badly (I thought it might be a bad cyst?) I went to the ER at 7 dpo.

They thought it could be appendicitis! (What?). So they did a CT scan. They said it was imperative, so I agreed.

They found nothing. No cysts, no appendicitis, nothing. Everything came back normal!

And today, and yesterday, I've been having HORRIBLE nausea. Even went BACK to the doctor because of it to get medicine, as it was tough to eat or do anything else.

Pregnancy test negative at the doctor's office.

My questions are these:

Is it possible to have a negative pregnancy test at the doctor's and a few days later, test positive?

Would the CT scan harm an implanting bean?

Is it too early to experience such sickness?

Could the CT scan be causing the nausea? (The one I had a year ago, I had no side effects).

I'm at a loss as too what is going on. They couldn't see early pregnancy in a CT scan. Could they?