During the end up september i had unprotected sex but he didn't cum in me. Less than 24 hours, i took Plan B. I took a pregnancy test about 2 weeks later and it was negative but i'm really afraid it was too early to test for pregnancy. After unprotected sex in september, in october instead of having a regular period, i had blackish blood. the month after in november i had a regular period but it was shorter than normal. In december i missed my period and i haven't gotten it since. However, in december when i was supposed to have my period, i had a high fever of 102 and the stomach flu. What does all this mean?