I would probably wait until you see him next week. I would suggest writing down how long you had relief and update daily on whether the pain is returning, how much, etc. It is normal for the pain to return with the blocks and it's actually very encouraging that you got several days of relief from your first block. Many people only get a couple hours of relief. I know it sucks to have the pain coming back but it sounds like you responded well to the block and if you do a series of them you will hopefully have longer results each time.