movement...?

Mi

I'm 15 weeks due on May 8th with my 5th baby... I know every pregnancy is different but for my first 4 I had already started to feel quickening by my 13th-14th week.. this time around I haven't felt anything yet.... I don't even feel pregnant. is there anyone that has been pregnant more then once that can relate..? who is feeling movement..? who isn't..? and when are you due?