I have an activated D-visa from Poland which is valid from 1 Oct 2018.
Almost immediately before my D-visa's activation, I stayed in another Schengen country for close to 3 months with a C Schengen visa.
I understand that with a D-visa I can go to other Schengen countries under the 90/180 day rules. So my question now is - can I still do that? or I have to wait for another 3 months because of my previous travel under my C-visa?