Had sex with my girlfriend 2days before her periods there were no internal ejaculations she had her periods 5days later and it lasted for 4 days as usual.. The periods were normal as usual and had colts...yesterday nit she had a feeling of vomiting sensations with a mild pain in the upper back... but it wasn't there in the morning nd she had mild dizzyness today noon is it a sing of pregnancy or is she stressed out too much... She has not been eating enough too!