question, calling mom's! I may be pregnant but I'm not sure. I know I had sex on my ovulation day…

question, calling mom's! I may be pregnant but I'm not sure. I know I had sex on my ovulation day and everyday after and the day before, I've been using a calender to track. I'm SO hungry, I've been having mild headaches and feeling alittle weird. I don't know my chances...help!! my period is due on the 19th. sld I wait to miss it? I would have conceived beginning of jan.