Thank you. Is it just the regular swallow pill, not the sublingual, right? Also, time released is that good or bad?

I am experiencing a lot of "brain fog" and feelings of hard to breathe and very weak. Is this common with low b12 that may have gone on for a long time? When I have the shots I feel fine. I gave myself a shot this morning when I woke up, the cyanocobalamin one though, as the methylcobalamin can sometimes give me too much energy.

This is really frustrating. How long before I will feel better from all this treatment? Some days are better than others, I notice (up and down recovery?)