Hi, I am 34 weeks 6 days pregnant with twins. I have been having pains in my lower abdomen since yesterday morning. It is not constant, but lasts about 30 seconds everytime, yesterday these cramps was approximately 22 minutes apart, and today it moved to about 8 minutes, and it is getting more severe. I am 34 years old. I was diagnosed with a pulminory embolis at 5 months pregnant, and have been using clexane 40 injections once a day since the diagnosis. Other than that, the pregnancy hasn't really had any problems. The twins were 2kg and 1.8kg at my last checkup, two weeks ago. I will be going for another checkup on Tuesday 10 May.