Hehe hey hun! Boy do I remember all those presentations we have to do in university for nursing!
I found relaxing and not thinking too much about the presentation helps, but hey if it was that simple we wouldn't get so nervous about it!! To be totally honest when you think about it though how many student nurses are actually going to be paying that much attention to what you are saying?!!!! Hehe! They are probably sitting there as I well remember panicking about having to go on stage and talk next!!!
Ok ... let's just think about this. If you had to talk to just one person there is a 50/50 chance they will like the presentation or not. The odds aren't good really are they?!! I used to think that there was much more of a chance of someone liking what I had to say if there were more people listening!! So having to present in front of a group of your friends is not such a bad thing, they are all in the same position and won't attack you if it isn't as good as you want it to be! I have learnt that I am definitely my own worst enemy and what I stress about and what I think went wrong, is the last thing that others remember!!
So my advice for what it is worth and what helped me talk at uni ... know what it is you are talking about! That way you can talk your way out of any questions at the end. You will find that if you can confidently answer a question most won't want to ask anymore for fear of looking silly for not knowing!!
Try not to have many notes to read from. If you can talk about your subject without having to read you will appear much more confident and able to talk well. If you are reading from a paper you will get nervous and be afraid to make eye contact with anyone.
Be friendly this makes you appear open and welcoming. Lectures and presentations are never fun if the person talking is rushing through without looking at people who are losing interest. You are teaching others about what you have learnt. A nursing presentation does not have to be rocket science! I always learnt that a brief information session on what I was explaining with small patient histories was a much better way to make everyone at ease.

Humour is always a good way to look professional and make the whole experience more fun!!
Power point is a brilliant thing if you are ok with it! It will take everyones attention away from you as they are looking at the screen instead and you can list points which you can go through so that you don't forget!
If you are really really scared the greatest trick of all is to have printed handouts but to give them at the beginning not at the end!! That way everyone is so busy reading that they aren't paying you much attention at all!!!

Oh ... and Bachs rescue remedy is fantastic!!!
Good luck with it and let us know how you get on!!!!!!!!