hello
well I had the pulsing in my gut too....you have a few sx going on so it's hard to say if it's just anxiety.usually there is a physical problem behind the anxiety.
the burning pain could be neuropathy,but the neck pain can point to a problem with the disks in your c-spine.I heard that neck problems can cause the pulsing sensation in the abdomen.I have two bulging disks in my c-spine(C5 & C6)so maybe that is the cause of your pain too.Medical texts only refer to the pulsating as being an aortic aneurism,but I had an abdominal ultrasound and it ruled that out for me.Are you a thin person?I am and my dr. said sometimes thin people can have that pulsing there.
It's not unusual for physical health problems to cause us stress.Have you seen a dr. yet?
Hope you get a diagnosis so you can know what's going on.Shortness of breath can mean so many different things,but maybe your neck/back muscles are tensed up which affects your breathing.
Please post back and let us know how you're doing.
Scout