Don't start feeling that any of this has to do with your nursing abilities. You unfortunately picked an area to work that in many places tend to have many clicks, and people that feel the need to down on others to make themselves look better can make it hard. If your co-workers felt that you were a danger in any way then they acted correctly in talking with your supervisor... but many times people act in other ways. I too was a float nurse for many years and you are right... we get dumped on. I now have a set floor and even on a large step-down unit such as mine I see what happens when a "power" person does not like someone.... its like they painted a bullseye on their back for the other nurses and they fire with great aim. My advice is to do what you heart tells you. If you love the OB then stick it out. Learn from each of these experiences, ask questions if you need to and expand your knowledge of your area. One day you will be more confident and those around you will see that you are willing to learn and not going to give up. And always remember... none of us know everything... and never will. Those who act like they do probably know the least. Take care and good luck!