im pregant and have strong pain in my lower stomach and lower back that come every 5 mintes
Severe pain of this nature should always be taken seriously and you need to see a doctor immediately. Depending on the stage of pregnancy and other symptoms, there may be a number of causes. Your pregnancy could be at risk. It is however possible that the unrelated to pregnancy (non-obstetric) but rather be on the safe side and see your doctor. Even if there are no other symptoms, an ultrasound should be considered just to rule out any complications.
This article may provide more information on abdominal pain during pregnancy.