Hi welcome to H.C.M.Forum. what is missing is your age. at puberty
it erects with out touching and sight stimulation, due to sudden testoron entry in the body. as it gets accoustomed starts erecting after mental, tactile and sight stimulation. as you had the change suddenly probably you are confused. consult a general physician, he will do neurological examination.you need to have drugs for anxiety
. thank you.