So i missed my cycle for oct, nov. then got it dec 11 and it was off by the 13th with no premenstraul symptoms. i then got my cycle for jan. that lasted 4 day with terrible premenstraul symptoms. could i be pregnant?

Missed period?: If you had sex since your last period and miss your period by 4-5 days, do a home pregnancy test. If the result is negative repeat the test 4-5 days later unless you get a period by then. Use first morning urine and follow the instructions for the test carefully. If you do not wish to be pregnant, use contraception all the time, every time. You may consider implanted contraceptive, or IUD. Practice safe sex. Get HPV vaccine.