WOW, looks like I am the first male to actually post on here, but I started having this same exact feeling a few days ago. The flutter seems to last 2-4 seconds, and comes and goes at different times, could happen every 2-3 minutes, or vanish awhile then come back. As stated, I am not a female, I am a 37 year old male, and have been trying to find information on what this is or what causes it. There is no pain with it, and it just randomly started. I am a diabetic, but don't really see how that can be the cause seeing that others on here are not diabetic, and are females. Any information would be great,as stated, this does not hurt, but is very annoying.