Katesquiltingadventure

Hi All!

I've recently just started quilting and I'm at the point now where I'm quilting my first quilt! (which I'm so excited about). I've basted my quilt, and just started quilting but a couple of times now when I've gone through the thicker parts of the quilt (where there's more fabric) the needle jars a little and the thread ends up snapping. Is this because I don't have the correct size needle or the correct thread?

Any help or insights would be much appreciated!!

Thanks,
katesquiltingadventures