6 month review (not what I expected)

So. I had my six month review today, even though it was 3 month overdue. It was very eye opening today because I seemed to get critiques about things I would have never thought I needed. My skills were great and at times exceeded expectations, (especially for a counseling starting out) my customer service rating exceeded expectations as well. HOWEVER, I was told my interpersonal skills with my co workers needed to improve. This was an absolute shock. This is such a blow to someone who prides herself on being "the sweet girl". One thing I have to learn is...you at work is COMPLETELY DIFFERENT that you out of work. Here was the problem:
1. Evidently, when I attempt to help out one of the case managers by calling finance and accounting to check on a consumer's bank account (because they had not done it in months and probably forgot about it because they had so much other stuff to do) this is considered "policing" and there was a complaint about me. Again, COMPLETE shock. What I have taken away from this: I understand the complaint and I will stick to my duties now, even if thinking I will help someone else out. It might be taken the wrong way.
2. When I have ideas that get shot down ,(which happens often because we don't have money and some of my co workers don't feel like doing extra work (which I understand and don't) evidently I don't react well and come off frustrated. Of course I am frustrated, my idea to improve our program just got shot down. Now I need to be more in check of my emotions. I am a very emotional person and need to work on not showing this as much at work (if you have any advice please provide)
There are many other thoughts that have come from this evaluation. This is the first job that I have ever had where I really have to work as a team. I have always been a very independent worker that has been given the opportunity to do my own thing, do it my way, and be proud of it. In Day Treatment it is very important for all 5 of us to "click" to provide the most for our consumers. I probably have a disadvantage with this because i have not been able to really work on my team work skills. This I plan to take on. It's so funny to think of myself as not a "team player" but I am SOO independent I guess that is just very obvious. This I look forward to working on. Once again, I blame being an only child.
Well, obviously I still have my job so I actually had a good 6 month review. Everyone has been very complimentary of my counseling skills, and this is the most important to me.
Sorry this is scattered I am watching AI. GO CASEY JAMES!