Since about 1.5 years I have a pretty annoying problem: I feel sick very often for no apparent reason. It started when one morning I had to vomit almost out of the blue. I have been very scared of vomiting ever since I was a little child and up to that point I had not vomited for 12 years. After that morning I started to feel sick more and more often. It happens when I go out with friends, but also when I am simply sitting in my room. As for time of the day, it happens most frequently in the evening. I might continue to feel sick for several hours, but so far I have not thrown up again. While I try hard to avoid it, I sometimes wish it would just happen so I´d stop feeling sick and stop being scared of it. I could never cause it intentionally, though.
I have no real idea yet what causes my feeling sick. I have had my blood sugar tested to rule out diabetes, I have kept a diary for six weeks to see if I react badly to some type of food and came up negative. The doctor I went to said there could be a myriad of reasons, so I guess I could undergo a million tests and still not be entirely sure I don´t have a severe physical disease. I have some strong reasons to believe my problem is psychosomatic in nature, though:
-It typically happens in the evening, which has always been a time of the day when I felt more anxious than usual.
-Feeling sick causes a strong emotional reaction: I start to panic, feel like I need to get out of where ever I am, I have trouble breathing normally, I feel detached from everyone and everything around me. I start to feel isolated, like I have been sucked into some parallel universe, as if I was drifting away from everyone else and nobody notices.
-It usually brings considerable relief for me to cry, or yell at someone, or simply talk to someone about how sick I feel. Unfortunately, there is not always someone available; and my complaints are also taking a toll on the people around me. I do not always feel like complaining or seeking comfort is welcome. When I can talk to someone, however, it usually makes me feel less detached and more grounded, which is of great help.
-I tend to feel sick and anxious particularly often in situations when there is a reason to feel nervous: Like before a job interview or a test, or before meeting new people, or when I am waiting for someone who is late.
-I have had complaints like these ever since early childhood, and there were always times when they were more and less severe.
The trouble is that sometimes I might be feeling sick for normal reasons, like overeating, or not eating enough, but I can barely distinguish this from instances when I think my sickness is purely psychosomatic in nature because either way feeling sick evokes the same emotional response.
I have tried to battle this problem by trying to reassure myself, talking to myself in my head when I feel sick, but most successful so far has been chewing gum (chewing reliefs stress and it helps having a nasty taste in my mouth), and putting a handkerchief loosely over my mouth in order to avoid hyperventilation (I don´t normally carry around paper bags

So, can anybody here relate to this?