Update!

I slowly started back on the trainer. It's actually not bad if you watch the Tour at the same time. I started on Wednesday keeping my heart rate under 100. Felt fine. Thursday at 110, and then Saturday, I watch the whole TT stage of the tour, 2.5 hours, at around 130 bpm - wanted to keep it lower, but it was hard to do while watching those boys riding so fast!
Then, yesterday, I finally got on the real bike. I took it slow and easy, and I felt great. My breathing wasn't great, but it's because my nose was running as it does when I ride, and I still can't blow or even wipe it. If it hadn't been raining, I could have gone all day.
Thanks everyone for the input!

L-