?????????

I took out my NuvaRing on July 2nd (when I normally would) and had my period July 7th-10th as usual. I decided not to put my NuvaRing back in this cycle. I didn't test for ovulation until one week after my period ended and began testing daily for two weeks but never got an LH Surge. I was supposed to start my period again on Aug. 4th and didn't. Still no period but had period symptoms a few days before I was supposed to start. I've taken 3 pregnancy tests and all have been negative (the last one was the day I was supposed to start) Should I be concerned or is this typical when stopping BC for the first time in years?