I'm only 28 weeks but went to the doctor for the same thing earlie, they monitored baby and She said everything was fine and at this stage it's normal. I too would only feel faint movements and she did any kind of moving was acceptable to count. But if your worried call or go get checked out, everything was fine with my baby but there is nothing wrong with a little piece of mind either :)
My doctor told me not to worry unless I get to 2 hours with out 10 movements.