hello. i am confused whats the right way to say "its okay" ,"dont worry about it" or "its alright" in turkish? what i know is that "tamams" means "its okay" but i am not sure. what about "its alright" is it tamams too? and does "dert etmeyim" mean "dont worry about it" ? thanks!

It is ok = (o) tamamdır.  --> ok = Tamam

ok? = tamam mı?

dont worry about it => Onun için endişelenme/kaygılanma - Dert etme.

its alright => Herşey yolunda.

i thought herşey yolunda means everything is okay 

Once I messed something and someone told me Rahat ol. I liked it.

oh well.