Internal early pregnancy scan?

I've booked an early scan for this Sunday a few weeks back and didn't know it is an internal one!!!

Now I'm panacking and worried about going! Especially with a man doing it 😢

I've never had to go have this sort of thing done, so to just lay there bottom half naked whilst someone sticks something up me, I'm Pertifried!!

Any advice or whether to avoid it and just wait 😳 (I need to find out how far gone I am because of a holiday booked and I can't be a certain amount of weeks, they need to know asap)