When will my period start, based on the 28 day cycle?

I started my period on the 1st of January, when should I expect the next one? Should I count 28 days from the first, which would put me at today, the 29th of January? Because I have been having cramping (very light and not all the time) for the last 2 weeks! And yes, I am sexually active. I took 3 test last week and they are all negative. And my breasts HURT, and are tingly on the nipple. Do you think I am pregnangt?|||28 days would be the 28th. Could be PMS, or it Could be to early to tell. Periods typically come in 28 day cycles, mine is a 27 day cycle, and some people never have a regular cycle. And your body's cycle can change. Be patient, wait it out, about 3-5 days after you are late take another test. Good luck.|||haha learn this in bio! yeyea, about 14 days to 20 to be safe.|||Jan. 1st would count as day one and the day before your next period is due is the last day(28)of your cycle so you should start on the 29th. Last week would have been too early to test most likely. I would wait a few days and test again when you are late. The question I have for you is, are you sure you have a 28 day cycle? Mine ran closer to 31.|||Take a deep breath!!! If you are trying to fall pregnant, your HCG might still be too low for a pregnancy test to pick it up, if your period does not make its appearance after two weeks, then you can look at the fact that you will be having a baby. Test again in 4 days! Other than that, you could have ovulated late which in turn will make your period late. Good luck if you are in deed trying to fall pregnant.|||You count the day you start your period as day one of your cycle. So if you started on Jan 1st, then you should start on the 28th. I wouldn't freak out if you are one day late; it is very common for your cycle to flucuate a day or more each cycle. Also, you would be the most fertile, several days before and after day 14 (middle of a 28 day cycle). If you are sexually active you need to use protection during that time - really all of the time - get real.





Too soon for a prego test, give it till the end of the week. More than likely you are not pregnant. Good Luck.