Went up last night and filed ifr for the first time solo. I logged 2.4 on the hobbs and all of it was night flight. i filed an flew a victor airways to my destination cho. Was doing great. it was a clear night with no reports of any clouds of any type. i flew the visual into charlottesville and parked, picked back up my clearance and headed back to manasssas. once i was switched to the sector controller over manassas he advised me that weather in hef was reported as 1/4 mile ground vis. then advised me that he need to check with tower and then we would discuss which approach i would use. I got real nervous, then settled inand faced the reality that i would need to fly this approach, and either go missed and land at dulles, or land at hef. as i got closer i could see the fog was evrywhere but on the runway. it felt really good to be able to know exactly what i should have done, and what would have happened.....just glad i didnt have to fly into that fog bank that was settling over dc. anyone else ever encountered an experience like this so green in the ifr system?