 [ Symptoms ] pregnant or late period  im 4 days late on my period which occurs between the 18th and 21st of each month i feel no early pregnancy or menstral symptoms i have taken 5 hpt up until today all negative the only changes this month r iv had high caffeine intake for instance coffee lack of sleep due to worrying and minor stress due to my mother moving in any insight [ Disease ] you have to right to make yourself vulnerable to any vaccine preventable disease fortunately there is not a global pandemic of swine flu right now and there is not a vaccination against hiv so you are safe