For those wondering, my guidance counselor called Senator Booker's office (not at my request, my nom came from Menendez) to find out when nominations were being sent out . he was told the notifications would be mailed out early February, and told me that they didn't say anything about calling. Chances are, it will show up on your portal before you get the actual letter! I got the call and they said it would take a day as it was sent that morning, but the nom showed up on my portal literally 2 minutes after so i guess it goes through very quickly. Good luck!