After masturbation and clean it properly by bathing then after few hour some sticky liquid is there in penis and that sticky liquid falls on floor can cause pregnancy?

Pregnancy cannot be caused by sperm falling on the floor. Pregnancy requires Sperm requires being placed into the vagina, where it can move through the uterus to the Fallopian tube, where pregnancy occurs. At 19, especially if you are sexually active, I suggest you get sexual education for both you and your partner, learn appropriate birth control methods, and enjoy a more stress free relationship