I remember stressing over these exact calendar dates! Normally it's safe, but our bodies can surprise us if we ovulate late. Just wait for your period date and take a test if it's late.
Having PCOS, my cycles were always irregular, so I couldn't ever trust calendar dates for ovulation. It is possible if your ovulation got delayed, so don't rule it out completely and test after a week.
It's highly unlikely unless your cycle is irregular. Don't rush to buy expensive pregnancy kits now, just wait for your period date to pass before spending on tests.
Usually the fertile window is much earlier, but bodies can be unpredictable. I keep active with my light yoga now, but if you do end up conceiving, check with your doctor before starting any exercise.
I totally panicked once thinking I got pregnant just before my periods, but actually my cycle was just delayed because of stress. Calm down, it's usually a low-chance window, but wait and watch.