AF comes and still pregnant?

Is it possible to have AF and still be pregnant? I’ve never had sore nipples or bumps on them before AF. I was EXTRA cranky staring around 5DO. My CM noticeably increased. And I’ve been having extreme nausea/throwing up during my period which is also abnormal. My cramps are sharper than my normal AF cramps. Is it even possible or is it all in my head?