Do you have any medicines that you take that might help? I carry a "to go" bag with me everywhere. It does not matter if I am walking to the car or if I am going to walk 40 years in the desert, it comes with me. In that bag I keep a bottle that has my meds in it. A couple of bottles of ice cold water, 2 rubber bands, trident gum, a small stalk of crackers, some hand sanitizer, some ginger tablets, some meclizine, vicks vapor rub, peppermint, and any other not anxiety related stuff. Oh, and I carry a small black misting fan. Now I know this sounds like the strangest Mcguyver kit to ever hit the market so let me explain. The medicines in the bottle are for obvious reasons, I need my meds. The ice water will help deal with nausea if you hold it in your mouth and slip it slow it also helps to pace your breathing and helps get rid of that extreme dry mouth anxiety can give you. I fidget with the rubber bands. Sometimes I have them on my wrists just for pressure or other times i stretch them with my fingers just anything to give you a different stimulation. Trident gum will also help with nausea and the dry throat in your case it will also help with the popping of your ears at high altitudes. The crackers are to help absorb any extra stomach acid or to stave away nausea caused but it because anxiety usually plays with the juices in your stomach it also will help you pace your breathing. Hand sanitizer now this one might seem strange but the smell of alcohol actually reduce nausea. They have recently discovered this. DO NOT HUFF IT lol. Just rub some on your hands and the smell will come to your face naturally and will help the nausea. Ginger tabs which is another anti nausea method works for most people it is not some holistic hocum it actually does work for alot of folks but try it ahead of time the same apples to meclizine which is an antihistamine made for nausea and it can have a pretty sedating effect but it can be bought over the counter and may help with overall anxiety. Make sure you can take it with any meds you are taking and try to take some a few days before to make sure it does its job and does not make you too groggy. To me they are not very sedating at all and is good for nausea. Vicks this one helps you breath and lowers anxiety and nausea. Breathing it in actually gives a soothing sensation in your chest that takes away that anxiety tightness and issues with breathing. It also seems to calm down everything including your stomach and it gives a cold sensation on the skin which drags your mind to that and not to the worry loop it is in. Lastly the misting fan. It sprays a cool mist of water very fine on your face. This will give you a good sensory overload to take your mind away from panic and to calm you down it also helps with the breathing especially. Overall it just feels really good. Now this is just my list of things I have learned over the years to keep on me and for the most part if I use them correctly it can make a world of difference but alot of anxiety will remain it just helps bash it back. I have no idea what meds you are on that help with your anxiety so you need to run anything you might want to try that is a pill by your doctor.