I made at ghusl at zuhr. I made ghus because after fajr, I went back to sleep. I woke up and got ready for school. I needed to go to the bathroom and realised that I had released semen in my sleep. But after the ghusl at Zuhr, I prayed asr with no problems. I fell asleep after asr. I woke up and it was time for Maghrib. I had to make istinja and I found a tiny little white stain. It was not even as big as an ant. So I assumed that you only have to make wudhu and then pray Maghrib. Wondering if that was Ok?