Me and my boyfriend had sex on November 17th and he pulled out, But also came all over me down there, then we started having sex again right after that. I have irregular periods, my tracker tells me I ovulated the 15th, But with my irregular periods it has fallen anywhere between the 15-22 or each month. A few days after sex I had mild cramping in my lower abdomen, and I never cramp, not even before my period. Yesterday and today, being days 5 and 6 after the sex, I ve been extremely tired, while also having back aches and head aches. Is it possible to be feeling pregnancy symptoms this early?