How can one ascertain virginity in cases of sexual harassment and masturbation without removing clothes, given prior discharge, and the fear of losing virginity based on viewing images of different hymens?

What we imagine is that this fear of yours is merely a baseless, illusory whisper [waswasah]. We advise you to trust in Allah, to have a good opinion of Him, to rely upon Him, and to hasten to marry when a suitable match proposes to you. Nothing will happen but what you love, Allah willing. As for the realization of this statement, you can consult the counseling section of our website regarding it.