Should I be worried???

Hi everyone, I'm hoping to gain some advice or reassurance. Recently, my boyfriend and I had unprotected sex on the peak of my ovulation cycle, a decision we now regret, considering we’ve always used protection. Although he pulled out, I'm anxious about the possibility of pregnancy due to precum. Immediately after, we went to get emergency contraception, despite knowing it might not be as effective during ovulation. I took it within an hour of intercourse. Since then, I've been experiencing symptoms that could be related to pregnancy, like dizziness and nausea. However, I've also noticed signs of an impending period, such as cramps and breakouts. While I'm trying to remain optimistic, I can't help but worry, especially considering a past pregnancy loss. Any outside perspectives or advice would be greatly appreciated. Thank you.