Riding every day at the same pace isn't enough. You need to read up on training as a cyclist, like someone said above, I would grab Friel's book. You need to alternate between easy and hard days, and do certain intervals at certain times in the year in order to make your body make the most use out of them.
Training on the trainer is enough to keep the body in good shape, but unless you were doing some seriously intense training, it's just not the same as the real world. Just build a solid base of mileage on the road the next month or so and then start incorporating some intervals and your body will come around.