Hi Lynn,
Keep plugging away at your planning and development of instructional strategies. What you are experiencing is "getting control" of your career syndrome. Not unusual for beginning instructors. When you are spending these very long work weeks trying to stay ahead of your students look for ways that you can present this same content next quarter without as much planning. Currently, not only are you getting familiar with the content but you are trying to manage a class and select instructional deliveries that will meet the needs of your students. All of these planning items take a lot of time as you well know. Once you get through this first course you will have a much better idea of where you should spend your time and how you can improve your course. Each time you teach the course it will get easier and require less planning time. Also, after a couple of times of teaching the course you will start to see how you can add additional PP slides or activities that will increase student interest.
We have all been where you are and it was tough but we made it. Teaching also becomes more fun once you get control of the content and delivery because you get to concentrate more on your students and their needs. Spending time with your students and supporting them is what brings it all home in terms of being an instructor.
Gary