Back ache and acid reflux?

So I had my gallbladder removed in December.  Have still been experiencing various symptoms that my doctor thinks may be due to acid reflux and a hiatal hernia.  I'm seeing a GI doctor Tuesday about these issues but lately I've had a new problem that I'm wondering if it could somehow be related to acid reflux. 

Several weeks ago I consumed just one alcoholic beverage and ended up with a bad cramp in the center of my back immediately afterwards.  Lasted about 15 minutes and then eased up.  Since that time the upper portion of my back has ached off and on.  Sometimes immediately after eating and sometimes hours later on an empty stomach.  Feels like a slight muscle strain but I've done nothing to bother my back and the ache is not constant.

My other symptoms include: upper abdominal tenderness, burping, hiccups, slight nausea, and some chest discomfort at different times.

Wondering if the back pain is a symptom of some stomach issue, acid reflux, or muscle related.  Any thoughts?

I also have pain in the center of my upper abdomen at the breastbone area and some on my right side. Didn't mention this earlier but I've had a couple really weird experiences after eating/drinking recently. One time I drank some water rather quickly and the upper part of my back and mainly my shoulders started aching. Had to lay down and after about 20 minutes the pain went away. Also had aching in the upper part back of my back and the back of my neck immediately after eating. How weird is that?

So I've been having anxiety over all of this so now I'm worried that the doctor won't take me seriously if I tell her I'm taking Hydroxyzine. The only reason I'm having anxiety is because of the discomfort I'm in. My appointment is tomorrow, with the gastroenterologist, so I know I'm not going to find out anything then. But what if after she runs test she finds nothing wrong? Then everyone will think I'm crazy. I get soooo freaked out when going to doctors, it's ridiculous.