so confused! help!

I'm so confused you guys! 

I had a weird/super light period on May 19 that lasted 4 days. Thought for sure I'm probably pregnant. Had only been on the ring for two months after not being on any form of BC. So, thinking that I'm 1-2 weeks at the time, I took out the ring to not risk any pregnancy issues it might cause. Then I bled again on 5/31 for 5 days-- heavy for one day and light the rest. The whole time I've had (sorry, TMI) diarrhea, occasional and random nausea, so fatigued, and so many other things. Today would be 31 days since my last period and I still haven't started or bled since the episode that started on 5/31. I've taken over ten pregnancy tests in this span of time and all negative. What do you guys think????