nickie is right - you really do need to see your doctor since you havent had your period in 5 months. The fluttering could be gas. If you have taken a HPT recently, its not likely you are pregnant as a test should give an accurate result 2 weeks after conception.
If you haven't had a period for a good few months then you definitely need to go see a doctor and have them give you a blood test and an ultrasound. Not really sure what the fluttering feelings are although it could be digestion or ovulation. Definitely have it checked by a doctor. I am sorry about the loss of your little one.