I had to have a tooth extracted last week. I usually manage to have fillings without an injection but had to have a local anaesthetic for this procedure. Within a few minutes of the injection my legs and hands would not stop shaking, my heart was racing and then I conked out! I came round with an oxygen mask on and two fans going and that was before she even started on the extraction!!!!! Since then I have felt really dizzy, spaced out and exhausted. Does this happen to anyone else after a local?