The earliest I've heard of a mother feeling her baby move was 14 weeks. I told her it was her imagination but the feelings got stronger and by 16 weeks she knew very well it was baby. This is her first pregnancy.
I think us women just get so excited waiting for that first feeling. After seeing mine bouncing about on the u/s I was shocked at the fact that one can't feel it yet. He was seriously going mad! I think we are so excited about it that we "feel" these movements but they're just digestinal or they're your body stretching etc.
I can't wait to feel mine

I'm counting the days. LOL that's going to make it take longer.
