I had my belly pierced nearly a year and maybe 3 months ago got it done professionally too much of a fag to do it myself and I had to take it out due to school finding out and I want to get it done again as I've moved school and there's like a millimeter scar when I feel where the old piercing used to be you can feel like a (tube/tunnel) sort of thing it sounds weird but you can feel where the hole/jewelry was.
Do you think I will be able to get it pierced again in the same place it was, as it was perfectly straight and everything.. or will it have to be in a different place?

You can most probably have it pierced in the same spot. The thing you are feeling might be the scar tissue that formed, which is just skin, nothing a proper piercing job can't handle.