Does anyone else get a horrible tense and acidly empty feeling stomach from anxiety and a feeling of not knowing if they're hungry? Also I do suffer with ibs
Yes...unfortunately all of these can go hand in hand with anxiety. The IBS can be worse because of the anxiety. I was just in the E.R. last night with epigastric pain, stomach pains, chest pains, and IBS symptoms. I got little to no relief and am sitting here trying not to have a nervous breakdown myself. I have seen a gastroenterologist and been scoped up and down 3 times each end 
and had the scans for the mid section of intestines and stomach they can't reach by scope. All of my tests always come back NORMAL, which is ever so frustrating when you can't fathom that all of these physical symptoms are just the result of anxiety disorder. If you have not seen a doctor for your symptoms please do so, then once you have your test results back, try to accept the results. I know it is easier said than done for someone with anxiety, health anxiety especially. Good luck!!!
I get this and it can make me sick too. Im quite tense when my anxiety kicks in bad and i can imagine this is one of the ways your body reacts. I can get sore from tensing up for so long too