It sounds to me like you're not ready for that kind of exercise yet, perhaps with the exception of short walks. If you start exercising to soon, you can really make your injury worse. It's far more important to give yourself as much rest as you can, and to only build exercise back in VERY gradually. I think weights and the exercise bike would be a bad idea at this point, but you could start taking some short walks and see how you feel. If your symptoms feel even slightly worse afterward, then you're not ready for exercise yet.