Ttc Weird Symptom ?? Pregnant or Normal?

Ok Barely getting better from a 1/2week cold cough flu it was bad but the worst part was everytime id take medicine ill throw up like this morning I took a lil lil bit cause ive noticed already plus im not sick just lil cough and suure enough vomiting it up .... im late my period hasnt got here today is my" last day" end day of pms but nada nothing and other then vomit ive been eating alot with a lil nausea but thats it ... and tired is it normal why is my body rejecting medication. ... ???