reading back to my answer its supposed to read a few times a week isnt much...
I agree with Lesley.
I started feeling movement once or twice a week around 16 weeks. Everyday at 18 weeks. And im a FTM.
i think you really need to talk to your Dr about this... fetal movement should be increasing and a few times a month isnt much... it could be just your body type but still should be brought to their attention