general problems of the 2012 Honda FIT

In extreme cold weather the brake pedal is rock hard and will not budge. After warming it up it will work, but intermittently, it will happen while driving. I will go to push the brake pedal and it won't budge and the car keeps going. I nearly crashed the other day. It has happened more than once. It's a very dangerous situation and if anyone were walking in front of my car during the episode, they would be killed. The other day I was able to swerve toward a guard rail instead of hitting the car in front of me. In the mornings I have to let the car warm up because I cannot even press on the hard brake. I'm not alone after researching this. It's not the brakes themselves. They work fine, it is the brake pedal and something mechanical, a valve or hose or something. I'm not a mechanic, but I'm a daughter, a mother, a sister, a grandmother, and a friend. I want to stick around! this happens when the car is stationary and when the car is moving. Luckily it has happened when I was on backroads and the car behind me noticed me having trouble and slowed down. I lost all control.