Sex before period

Emily

Hey guys weird question… I had sex on the 20th (ttc) and started my period on the 22nd and now it’s the last day of my period but I’ve been getting headaches like crazy, insomnia like hell, acne, nausea and shortened period flow… I usually only get cramps on my first day on my period and that’s all nothing else from the rest of the cycle… could I get pregnant right before my period started?