Regular use of sildenafil in healthy people (especially those who do not have erection problems) usually does not lead to the fact that the erection will last shorter or serious erectile dysfunction occurs. From what you write, the symptoms may have a psychological basis - the current erection problem may be a symptom of anxiety - since for several months you used the drug "for your own mental comfort", perhaps the anxiety has intensified and the problem is growing, so it is worth consulting, for example, a sexologist or consulting a psychiatrist. It is also possible that the current problems may result from the development of urinary tract disease (e.g. inflammation of the prostate, prostate hypertrophy), which was masked by regular intake of sildenafil. Therefore, in parallel, it is also worth consulting a urologist. An introduction to further diagnostics may be a teleconsultation with a doctor, e.g. here: https://www.gdziepolek.pl/telekonsultacja I also attach links to helpful entries: https://www.gdziepolek.pl/opinie-i-pytania/11899/sildenafil-jak-czesto-mozna-sotowac-lek-sildenafil-actavis https://www.gdziepolek.pl/opinie-i-pytania/47613/sildenafil-czy-dlugotrwale-przyjmowanie-50-mg-sildenafilu-raz-na-tydzien-moze-prowadzic-do-uzaleznien I encourage you to watch our short video: