Can I get pregnant By Unprotected Sex Even after Starting Periods

Patient: I had sex yesterday, for the first, around 3am. Was unprotected. I’ve been having weird feelings in the upper and lower stomach and habe been feeling a little gassy. I have an irregular period, but I think I started today, do I still have a chance of getting pregnant from that night? n

Symptoms: Gassy, weird feeling jn stomach.