What could cause a lower abdominal pain that goes to the lower back all the timand severe cramping during periods?

Sounds like regular cramps to me. A lot of women get pretty harsh cramps around or during their periods. If they are very severe or you are concerned, you should talk to a doctor. When you have your period, you uterus is having contractions. Sort of like a very mild form of the contractions during childbirth. Some people recommend taking Advil, Tylenol, or Mydol, and some people claim taking medicine makes the cramps more intense the next time you have your period. I, personally, need my Advil! My daughter has the same problem and the pain is so severe that she ended up in the ER. She says the pain usually last for at least 3 days. They told her that she had a cyst on both of her ovaries ( the cyst are larger than her ovaries ) and that a lot of women get them when they have their periods and when their periods are over the cysts will shrink. If you continue to have painful periods go to your Dr. and have him exam you. Mine was caused by endometriosis that eventually required two surgeries to remove the growth and then a hysterectomy. It could be normal cramps or cysts as well. If it is severe and is disruptive to your life it is not something you have to live with. Even if it is "normal" and you are perfectly healthy there are still options to help lessen your discomfort. I would talk to your GYN about it and see what options are available. They can include stretching/exercise, pain pills (like Advil or my favorite Aleve), hormone pills (like birth control) that help regulate your period and for many women reduce or eliminate cramps, or heating pads. Whatever is comfortable and effective for you. Sometimes the fallopian tube may be narrow and cause some problems, or if the person is stressed their abdominal muscles are tense and can cause cramps. If this continues with each period then you should see your Gynecologist for a check-up to be sure everything is OK and you don't have cyst.