My aunt thinks you cant get pregnant if you have sex while on your period

She's dumb, my other aunt my moms sister worked at the hospital w/ babies & went to medical school I think I know where to get my accurate information from. Its funny how I'm supposed to start today no signs of it, had sex 2 times while on it & basically every day of my fertile days & still no show of my period. I been trying 8 months to conceive could this month be it? I've been peeing alot , getting up middle of the night. Hungry will eat anything , cravings ☝ ; dizzy & nausea ! Here && there might cramping . egg white cm. Soo tell me?