Are you wearing any rubber type gloves? They have those rubber gloves you can buy at the hardware store that are nice and strong, like the machininger gloves that are twice as much, that work real well so you can grip the fabric better. I use the ones my husband sells instead of the quilting ones because they are three times less. They last for a very long time. No not the rubber gloves at the doctors office. They come in blue, purple, orange.
One thing that I taught my girls on their fmq, is to think of when you rub lotion on your hands and body, you don't just slap it on and let it fly everywhere, you take smooth strokes and with sincerety. That is how you approach fmq. I teach this at our local quilt shop.