sounds as though after the panic attack you still have severe anxiety, and yes, anxiety can cause all these things.

unfortunately once you have thrown up and with the sobbing, the tummy will tend to stay contracted and inflamed - vicious cycle.

what i can suggest is 1. taking a demulcent to soothe the GI tract and 2. breathing to relax the diaphragm.

demulcent options are:
1. (BEST) Mallow infusion - need to have it bought from an herbalist or similar store. it doesn't taste like much, but it has a lot of mucilage which will coat and soothe the membranes of the GI tract.

2. Liquorice infusion, or pure liquorice - the latter is not those gummy red or brown plasticky things. this is hard, bittersweet and very hard, black "candy" (extract) that usually comes in very tiny niblets. not sure if can find in US - possibly with herbalist. avoid if you are diabetic or hypertensive as it tends to raise blood sugar and pressure. the infusion is ok and i know that is available - Stash teas makes an excellent one.
3. Chamomile infusion (if not allergic either specifically, or to the daisy family of plants). not as good as Mallow. mildly calming. no more than a couple cups per day - beyond that i would be afraid it could increase med levels, as it is a P450 enzyme inhibitor and i am unsure of its potency in that respect.

breathing:

sit/lie with your hands on your lower tummy. breathe focusing on your breath and with it, causing your tummy to rise and fall, rise and fall, slowly. as if you were inflating a beach ball inside it. this type of breathing helps relax the diaphragm which tightens when we are anxious. it should help release those "knots in the stomach." this should actually help resolve some of the anxiety at a physiological level so it may help with the freezing/burning too, i don't know.

can you do anything to take your mind away. any sort of light reading perhaps.

i hope you feel better soon.

~ waves ~