Hi there I had my B12 injection last week, I managed to get it a week earlier, thinking to myself yes I'll get a boost, I was wrong 👎 I've had no boost, my lower back is crunching with pain and my sppech, well neuro symptoms are all still there ! Has anyone else suffered a bad injection ? If I can call it that as I thought I'd have some benefit by now ?,someone did say to me it can take over a week to kick in ? Normally I'd have seen a slight improvement even if its only slight. Feeling frustrated