Nuva ring

Hello I started my Nuva ring on June 17 and I chose to do the method with no periods so I was supposed to change the ring on the 17th of July and i noticed some spotting so I remembered I had to change it and I changed it late on the 18th of July I had really dark discharge almost black for about a week straight to the point where I just took the ring out On the 24th of July to let myself bleed I am not sure if that was the right decision or when I should put the next ring back in I am not sure where to go from here what do you guys thing any advice or help