Cramping nausea headache backache is this all signs of pregnancy. First day for cycle was 12/1/12.?

Not compatible with. Pregnancy. If your dates are correct, you are not likely to be pregnant. You may do a home pregnancy test if you are about a week past the expected date of your period. See this site for signs of pregnancy. http://www.webmd.com/baby/guide/pregnancy-am-i-pregnant.