The opening of my vagina is cramping and i have stabbing ains in my uterus i woke up to blood in my bed, i think i passed a blood clot and its not time for my period

Is : Is there a chance that you may be pregnant? If so then you need to see your doctor and/or take a pregnancy test to confirm. If a normal period started then you may just be having early menstruation or like i stated, miscarrying if this is a possibility. It is very difficult to say without a complete evaluation. Please see your doctor. Best of luck.

Agree with Dr. J: If you had sex since your last period, you may have gone through a spontaneous loss of an early pregnancy. About 25% of pregnancies are lost, mostly due to chromosomal defects in the embryo. If the bleeding is different from your usual period, you should see your doctor. Have a healthy diet, drink plenty of water, avoid alcohol and street drugs, exercise at least 150 minutes per week.