Okay so me and my fiancé been having sex without a condom since December 25th 2013 and I usually have my periods every month on the 8th but this month in January my period didn't come until the 13th but only lasted for 3 days and it last up to 5 days every period and my fiancé been coming in me since December 25th until January 20th we've been having sex non stop.. and a week ago I took a pregnancy test but it was negative.. what should I do? I need some advice.. please help me

If you do not want to get pregnant, stop having sex without being on birth control pills or some control method and using condoms also. Even if you used just condoms, they have a 3 to 18 percent failure rate.

Next no, you can not get your period on the 8th of each month, a period would be a certain number of days, between, 25, or 30 or something, ( some women just vary) but some months have 28, others have 31, so your period has to vary just because of that.

You should wait till about Jan 27 and test again, this time be sure to do it with first urine of the morning as soon as you wake up for best results.

Okay , but could I be pregnant? I haven't been throwing up but I've been feeling sick.. and my emotions been driving me crazy , I get emotional quicker now

You could be pregnant, but the symptoms that you're showing probably aren't due to pregnancy. The hormones and the like kick in when you're embryo has been implanted and growing for a while. It is far too soon for you to be displaying such symptoms. Chances are they're psychosomatic and you're only looking for them because you're unsure whether you're pregnant. You trying to decipher it from your body, but the only real symptom you're going to get from your body is a missed period.

You could be pregnant, but the only way you would know is a test in a week or so.