Thank you a lot for answering Dr Saghafi. I didn t explained my feeling well. I wasn t feeling weak but after having that pop i felt like falling for 1 or 2 seconds. Moreover, i don t have those headaches anymore, but sometime I can feel like paresthesia on my head for example while i am doing particular exercices at the gym. I have had that pop feeling only one time, ans then after 1 or 2 weeks I started to have headaches (moderate pain) and alot pf psychological symptoms such as palpitation before going to sleep, moderate dizziness. I must say that for 1 week I felt really bad due to extrasystolis (don t know how to say this word in english), and I was thinking that I couldn t do sport anymore ect ...... Over the time I try to accept the fact that it is stress related but when i got I little bit dizzy i strat to be worry one again. Do you think that and RIM is necessary in my particular case ? Best regards.