Need help to ID potential fossils found in The Little Harpeth River in Brentwood, TN

[KWalla]

I think these are fossils but need someone to verify and possibly identify. I found these in a creek bed along the Little Harpeth River in Brentwood, TN. They were all within a 30’ area in the creek bed. Some may not even be fossils but figured I’d post pictures just in case they were. I’ve taken close ups of the first row and if I need to take some of the other rows I can.

“A” and “B” are the ones I’m most curious about because to me they look like actual fossils.

”C”-“E” feel like a shell of some sort, like a turtle. 
“G” & “H” are cylindrical looking and sound like porcelain when you tap them against something.

“T” looks like a finger and has ripples in the sides and is fairly heavy. Not light like a regular fossil would be.
“U” almost feels and sounds like porcelain and I found it in the same area as these others.
The last one is what I think is a turtle shell that doesn’t look to be a fossil but I’ll leave that up to you all to decide.

 

          

 

 

 

 

 

 

              

 

 

[Slow Walker]

G looks like bone of some type. 

[Brandy Cole]

A and G appear to be bone fragment.

B does appear to be a tooth of some kind.

 

Pictures of the sides and biting surface would be helpful in identifying the tooth.

[Fossildude19]

I - S  look like rocks, from the picture provided. 

[Brandy Cole]

V looks like turtle carapace.

More pictures of L may be useful.

U looks like it may be manmade to me.

[Fossildude19]

Cropped and brightened:

 

[KWalla]

Thank you all for your help!! Here’s more detailed pics of the first row and T and V. Two of the pieces, D and F, actually fit together. 

[Brandy Cole]

The last picture looks like it may be pieces of a modern broken turtle carapace.

[Fossildude19]

T could possibly be an orthocone nautiloid.