Vaginal Ring

I Used The Vaginal Ring Twice. Once In Like June or July Then I Stopped n My Periods Came Back Then Once In November N Took It Out In December. In January I Took A Plan B And Missed My Period Until February. Now My Period Was Supposed To Come On About 7 Days Ago. But My Periods Have Been Longer Cycles. Could The Birth Control Still B effecting My Period???

- I Had Sex on What Was Supposed To Be My Day Of Ovulation, But Idk I Feel Like This Is Just Another Extremely Long Cycle.

How Long After Vaginal Ring Can Uu Get Pregnant?