 [ Symptoms ] missed period but negative test for pregnancy am i pregnant or is something wrong with me  i was suppose to have my period on the first of january i am never more than a day late and i keep track of my period and ovulation schedule via a calender i have been nausea at work my skin has been really sensitive to touch i have been so tired as well i am not under any stress but when i took the test on the 3rd it came up negative i used the first response pregnancy test my husband and i had sex frequently through my ovulation window as well [ Disease ] hi ok what plan b will do is alter your period date so when your get the bleed from plan b this is now your new period date it will be ok to start then hope this helps you good luck