According to your symptoms chances are,
1. Your are having diarrhea which is leading to abdominal pain
and bowel movements.
2. If you are not sure of your dates and your pregnancy is younger than what you are expecting chances of ectopic pregnancy is there.
3. Chances of miscarriage
is there according to your findings if you had little spotting or bleeding from vagina.
4. Chances of scar dehisence is there in case of prior cesarean section.
5. Chances of surgical complications of pregnancy
Any of the above conditions is dangerous during pregnancy. So, better immediately visit your gynecologist and get checkup done inducing with ultrasound