NuvaRing= Period Confusion

I gave birth March 16, 2017. I had my first period May 17, 2017 when I then started my first NuvaRing. My doctor told me it's no need for a period so I could "stack" them. Meaning on the 28th day take it out and replace it with a new ring, and on the 3rd month of "stacking" to allow myself a period and then continue for the next 3 months.

Well all was fine and dandy until I had break thru bleeding or maybe it was a period starting June 29th (on my birthday 🙁) until July 12th continuously.

I don't know if it was a period or just break thru bleeding. My period was supposed to start today July 16th, but something in my heart tells me I shouldn't expect one. I did take out the ring to level out my hormonal levels.

I've taken pregnancy test all negative.

But what gives! I was on the NuvaRing and stacking 5 yrs ago after I had my oldest son and never had any issues.

Have you ladies experienced this? Would you consider it a period or no?