Skin becoming dry and grey especially the lower legs after transmutation

Hi, I have been practicing these teachings for more than a year now and I think because of a lack instructor and proper guidance and in pursuit of eliminating nocturnal, I overdid breathing exercises. For a past few months I have noticed that whenever I do unipolar transmutation exercise such as ham sah or with some mantra, my whole leg becomes grey and dry and same happens on torso and sometimes hands.

I sometimes feel chest pain a day after I do transmutation.

Because of these problems, I'm currently avoiding any transmutation with breathing exercises and astral projection practice with mantras.

I try to transmute by mediation and imagination and the same for astral projection however I have been unsuccessful at astral projection.

Lastly, when I transmute I can feel electric current like something flowing up my spine to the brain.

My questions:

1) what's the reason why I'm having such problems with the breathing exercises and what can I do to remedy it?

2) Does glorian still provide guided courses both first and second chambers for aspirants who are extremely serious about this path?

Thanks in advance.