Hey you are not alone re presentation fear. Some excellent advice here from many years of presenting (I hated it but ended up being quite good, apparently). I'll add this:
Be clear about what you want your audience to leave in their heads once you've done your bit - what are your 1-2 clear messages?
keep it really simple. 5 minutes is a very short amount of time.
Be structured:
Thanks <previous presenter>. I'm going to cover x and y and then handover to <next presenter>
So, first message is this .... simply in one clear sentence. Follow up with a point or two to expand / explain. Use examples that the audience can relate to.
And the second message is this .....-simply in one clear sentence.
Follow up with a point or two, or example to support your point
To finish off say, so I've covered point 1 and 2 so I'll handover to <presenter 2>. Over to you .......
This is a scientifically proven structure that makes it clear for the listeners as to what you are saying (and helps them to remember ) and makes sure you get your points across.
If you've only got one message to deliver then use the same structure and support your message with 2-3 clear supporting points, like this
Main message
Supporting message 1 - evidence to show you are right
Supporting message 2 - evidence to show you are right
So my Main message is this (say it again)
Then handover.
For example
I'm going to talk about why Mumsnet is so brilliant for women
Firstly it gives them a safe space to talk about whatever they want - for example there are over x topics covering all elements of being a woman and having children. From toddler-taming to what to wear to your nans funeral. It's all there for whatever stage of life you are at.
Secondly it builds a community of women who support each other and bring a wide range of perspectives and life experiences. For example there are doctors, lawyers , teachers and SEN parents all with a huge wealth of experience and wisdom that they willingly -and anonymously - share.
So, in summary Mumsnet offer women a safe space to discus whatever they need to get though life, and provides a supportive community.
Now I'll handover to xxxx who'll talk about why X/Twitter is now so toxic and everyone is leaving in droves.
HTH