Ah, another example of the OR eating their young! I don't know why this happens, but it does. I try really hard not to do it, but have to admit, I have been guilty of it. It takes a long time to learn the OR and to feel comfortable. I tell all the newbies I orient that it will probably take a year.
I agree with what canesdukegirl told you (even though I don't prefer her college selections. lol). Keeping a pocket notebook is a great idea. Nobody can remember everything. I've been doing this for 28 yrs and I still need notes. You will remember more and more as your experience grows.
Just keep doing what you are doing and the staff will come around. For whatever reason, OR people make you prove your worthiness. Just remember that your patient is your #1 priority.
Hang in there and good luck.