From last one month i felt like brain fog and less alertness while walking. And when i was walking i felt needles and pins sensation in my legs and if i stop walking those pins and needles sensation gone..i don't know what's really going on with in me.. And i feel like little falling while walking..and i am having heart palpitations too..my cardiologist told those are pvcs..and i have done almost all tests like ECG,2d echo, tmt, 3days Holter monitor test and it's showing less than 01 percentage of pvcs and my cardiologist told it was ok fine no problem..but from last one month this heavy head and drowsy ness and while walking i feel like less connectivity to the environment. I felt like iam into some transe not in the moment..and i have done plain brain mri and it was normal. Please guide me doctor..iam hopeless