Hi, thanks for the query to H.C. M. C.
Sure there is gastritis
and mind it that is very common in Indians so please need not to worry at all.
Your's problems are that you feeling heavyness in chest, in stomach. Feeling headache, legs are heavy and little bit confusion.
Please note that these type of reflux oesophagitis ( heaviness in chest ) don't treated with simple treatment by a physician so you should also take an advice psychiatrist
As far as concerned about many tests and examinations you have gone through, this will give you some booster that nothing is wrong in your case.
First of all not that every thing which we wants not happens in same as we require so adjust according to situations and you feel relax.
2nd point is that different type of persons have different type of pain threshold i.e. one can feel very less pain while others feel very high pain.
In this way be happy and see the beauty of world. Good luck. Dr. HET.