Hi, Welcome and thanks for posting your query to HealthcareMagic. As per your query you have the multiple problems of stomach pains, skin pigmentation, cloudy vision and rashes on chest and neck. As per your query you have even gone for HIV test done which came negative. Now as I can get it appears that you are quite tensed about your situation and not only in recent days but since few months back when the problem started. There can be a initial event of anything regarding which you are still tensed or confused about. To guide you better, when all the blood test are normal it means there is nothing serious in the body. Now the only part remains is of stress. your stress itself can be major cause of all the ailments you are feeling. By stress you can have stomach upset which can result in hyper-acidity causing more of abdominal problems and also sore throats because of regurgitation of acid in the mouth. Cloudy vision can again be a part of your stress causing more problematic situation. Regarding your rash you can meet a dermatologist who can guide you better. Lastly kindly reassure yourself and live a productive life. I hope these information s will help you. If you have further queries I will be happy to help. Wish you good health and early recovery from the problem Regards, Dr Sanjay Kumar Kanodia MD (Dermatology)