please need instant responseplease need instant responsemissed whole period then it came the day after it was supposed to be over now i have this terrible cold and small headaces every now and then i don't know if I should go to doctors or did my period just change? went ahead and bought prenatals just in case. ALSO VERY TIRED

Not real likely that you're pregnant if you did start your period. It could be that you conceived then miscarried. Or if you were starting to get sick, that could have affected your period. Stress can also make you late, so I wouldn't be terribly concerned.