A period tracker isn’t going to predict your ovulation/fertile window incredibly accurately unless it uses a learning algorithm and with only being on your first cycle of data it’s doubtful the predictions for your fertile window are correct. Especially just coming off of a contraceptive. It’s definitely possible to conceive right away but it’s not likely. You should always go off of what your body is showing you over what any app says. Try using the FEMM health app for an app that teaches you to predict your own ovulation window. What app are you using?
It wasn't necessarily all over, but symptoms like pms and discharge were super different/weird for a few months