My erection goes down fast when doing jelqs , erect band etc... It has been like that since several monts and it is not because of lack of rest or anything like that coz recently ive stoped exercasing or if i did it was very rarely. Any suggestions what might be wrong ? Before i havent had this problem . Once when i was clamping my penis(it was several months ago) something hurt me at the base and i think since then i have this vein in there and im kinda thinking that my erection goes down fast becasuse of that vein ? or is it in my mind ? im very confused . PLS HELP