If you have been running high for long periods of time, your body will have grown unaccustomed to normal blood sugars. It's quite common to feel hypo as you take control, even when you are not. Provided you are avoiding highs and taking control, over a few weeks this should go away.
As a side note, judging by your profile picture, I would also suggest avoiding creating any more horcruxes, as there have been no reliable studies on the effects this has on bloodsugars.