Thanks for the query.
According to your history there is possibility of some structural problem like:
Bulky uterus can be due to presence of fibroids or endometriosis
or some other cause etc.
So this time from the beginning of the pregnancy
you take regular antenatal checkups, ultrasound
supplementation with your doctor's advice.
Go for cervical stitch at around 15th week of pregnancy.
For more details you can ask me through: http://www.healthcaremagic.com/doctors/dr-sree-gouri-sr/63429