Talk to Urologist on Nightfall Problem

I'm unmarried. First, Is it normal to have nightfall every week ? (After every 7 days) Second thing is sometimes the quantity of semen ejaculated during nightfall is just 4,5 drop but sometimes it's a lot and whenever it's in big quantity, my testicles creates movement in sack continuously, I can feel the movement even after 1 to 2 hours. Are these conditions normal ?