Was it frozen solid, or just slush? There is a difference.
If you got all the water out, and had pure "pink stuff", you should have been fine....it will turn to slush, but not freeze to the point of damage. After all, slush can still move in the lines, so it won't expand out-ward, busting tubing.
The one think you didn't mention, or you didn't do, was to pump antifreeze into the water pipes after you blew them out. The reason I recommend this, is because you may still have water in those lines, where the air has blown past it (say in a dip in the hose)....if you pump the pink stuff through the lines, you know that there won't be any water to freeze. Well worth the extra $$ for another gallon or two.