Hello doctor since one week it happens three times that I m feeling diziness, chest pain, safocated etc. it goes serious when I'm in stress or thinking something negative..initially I thought it was a BP or heart problems but I check my blood, urine, X-ray and electrocardio gram as well the doctor said there is nothing wrong with your system and it could be a somekind of reaction from body, if you could advice me on it what is it. today I was in office Normally I don't do breakfast and my office cabin doesn't have air vantilation, got AC but feel cold..morning time it happens frequently and when I keep walking or come in fresh air it seems OK. I'm afraid doctor please advice