My period is due tomorrow. My period are irregular. Last month it came three days early. I'm not on birth control but my bf and I use condoms and doesn't cum in me. I still get very nervous before my period, and I take a pregnancy test 5 days before my period comes. I took one yesterday it came out negative. For the last few weeks I've had a very bad cough and cold. I've been back and forth on NyQuil, DayQuil, and I've started taking mucinex. Could my illness and the meds I've been taking affect my period?