Good Job Paula. Im just getting into DSO photography aswel. What mount are you using? My first attempt was also on M42. Got lots of nice colour but i had obvious drifting problems. I purchased a stand alone autoguider from ebay ($300) and I havnt looked back. It seems obvious, but if you spend the time to drift align and get it as close as possible, it pays off.Even with the auto guider.
Its the joy in captering your own images that makes this hobby rewarding. There will always be bigger and better shots taken using setups that cost the price of a house, but when you can hold a picture in your hand, that you took, of some far off nebula or Galaxy, its incredibly rewarding.
Keep it up mate...
Ps, have you looked into dark frames yet?