Overthinking is associated with anxiety. There is a tendency to amplify the problem out of proportion, or attribute undue importance to something. Fantasizing about a homosexual erotic video does not necessarily mean you are homosexual or bisexual. Many people experience such fascination. Having a preference for a partner in all aspects: sexual attraction, compatibility,emotional connection, etc determines your sexual tendency. One isolated event does not necessarily mean anything. I am unclear why you are taking tentex royale and confido.
Next Steps
Learn to engage yourself in some enjoyable activity. Spend more time with your friends and family. Involve yourself deeper into your work or studies. Keep your mind busy. Try meditation, yoga and deep breathing; these will help you relax.
Health Tips
If you begin to feel suicidal or hopeless, consult a psychiatrist immediately.