I need help! On the instructional video for rear facing, it says that you need a rolled up towel or a pool noodle under the car seat but both compress so much that the seat doesn't seem secure rear facing.

We had to face DD forward facing on the ride home from the dealership last night since the car seat fits differently rear facing in the new car and seems even less secure. She's 14 months and above 20 pounds but I don't really want her sitting forward yet.

Any suggestions??