Agree with others about seeking a second opinion if you're not convinced. But a CT, US and bloodwork are pretty sufficient to specifically show liver issues. Also, I know I was completely paranoid in the beginning with any and all "pains" I was having that I had never noticed before. Could just be you're extra sensitive now that your brain is not always fogged with alcohol. And realize your body is in "shock" from lack of alcohol, so it is slowly adjusting to new things.
Are you taking any supplements? I was taking certain supplements(on my own accord - not doctor recommended) and noticing sharp abdominal pains at the same time every day. I quit taking them and .....pooof.....gone.
I wouldn't worry too much if your doc said you're fine. Our bodies are amazing things, but they take time to heal after constant abuse.
Good luck.