Trimming formula in Excel

Hello! I have an issue with a trimming formula.

I am trying to trim a string and I want to get anything that is between the first and the last dot of the string. Here is an example: I have www.help.needed.com and I want to get only help.needed.

I have used the following formula: 

=IFERROR(LEFT(RIGHT(A2,LEN(A2)-SEARCH(".",A2,SEARCH(".",A2))),LEN(RIGHT(A2,LEN(A2)-SEARCH(".",A2,SEARCH(".",A2))))-FIND(".",A2)),"")

However, whenever the last part of the website is different than ".com" but it is, for example, ".de" it trims also what is before the dot. Here is what I mean

www.help.needed.de --> I get help.neede (it omits the final "d") 

I have also tried with 

=RIGHT(A2;LEN(A2)-FIND(".";A2)) and then =LEFT(B2;LEN(B2)-FIND(".";B2))

Can anybody help me?

Thank you very much