Hi normal period 12/16. 12/26 started to spot for a day and a half. I had mild cramps in abdomen and lower back then decreased. Now 2 days late?

Pregnancy test. If you had sex since your last period and do not get a period in a couple of 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.