just a question about my files

Hello, everyone, im new in this forum, i have been hearing about this thing about retrogression. This is the case, i had a priority date whis is oct 9,2003, i took nclex and passed nclex already, ICHP has been approved, NVC has approved my green card petition, My papers have reached US embassy in London, am I still affected by retrogression thing, and if you are looking how the May Visa Bulletin has moved, can someone give me a rough estimate when i am gonna be called for Interview. I assume schedule of inteviews are affected by these Retrogression as well. Please enlighten me, and thanks in advance