Third cycle after plan b is messed up. Should I worry?

My bf and I had unprotected sex on June 21st, which was around my predicted ovulation date. He did not finish inside and I took the pill like 3 hours after. On July first, a few days early (usually I get my period around the 7-12th day and it lasted for like 5-6 days), I got my period which was slightly lighter but lasted for 5-6 days, and we had protected sex on the 26th. The next month I got another 5-6 day period which started on the first of the month. My bf and I had protected sex on the 21st of August. Ok so it’s now sept 5th and I am still without a period, making me five days late. I got my acne, tiredness, cramps, and sore breasts around the 2nd or 3rd, but still no period. I do wanna add that I have been exercising a lot more this month, and something really emotionally traumatic happened to me around like 2 days ago so I’ve been really stressed, but I always thought that stress would only delay ovulation, and I am past my predicted ovulation date. Could it be plan b still affecting my circle?