I found this:

Abdominal pain in general is not entirely uncommon during pregnancy. During the early stages of pregnancy, it is possible that a woman will have an episode or two of light spotting or bleeding, and this may be accompanied by mild menstrual-type cramping pain. Beyond this, however, menstrual-type cramps during pregnancy are not generally considered normal and can be a sign of a problem.

It is important to remember that sever or persistent pain in the abdomen is never normal, whether or not you are pregnant. On the other hand, pain that is mild and infrequent is very common. Many pregnant women, for example, will experience some degree or another of cramping after an orgasm.

Stomach pain during pregnancy can have a variety of causes. Sometimes, this pain will resemble menstrual-type cramps. Gas and bloating, for example, are very common during pregnancy. Constipation is another common cause of abdominal pain for a pregnant woman. A brief, stabbing pain on one side of the abdomen or the other that occurs during the second trimester can be caused by round ligament pain. This is pain caused when the ligaments that support your uterus begin to become thicker and stretchier to help support your growing uterus.

Menstrual-type cramps during pregnancy can be indicative of a variety of problems. If your cramping is preceded by bleeding, either light or heavy, and if the cramping is rhythmic, you may be having or may have had a miscarriage. This type of spotting followed by cramping can also be a sign of an ectopic pregnancy. In either case, you should contact your health care provider, as an untreated miscarriage or ectopic pregnancy can be very dangerous.

Later on in pregnancy, these types of cramps can be a sign of preterm or premature labor. This type of cramping will also generally be preceded by a vaginal discharge that is bloody, pink, watery, or mucus-like. If you have strong or persistent menstrual-type cramping during pregnancy, you should talk to your health care provider right away to determine if there is a problem of some sort.

In my previous pregnancies, period-like cramps were common every month about the same time I would have normally gotten my period. Some web sites state that this pain is just your abnominal muscles expanding. Don't worry about it unless you start bleeding or if the pain gets worse. Congratulations and Good Luck.

you can have cramps/uncomfort during pregnancy if its something that truly worries you head into L&D to be checked out better safe than sorry

At approximately 28 weeks, I had the worst 'crampy' sensations. Went to L&D at the behest of my doctor and was monitored for a few hours. Slight contractions were attributed to Irritable Uterus.

Well no duh my uterus was irritated! I was growing a baby in there! Sheesh.

You should call your doctor just to be safe - s/he may ask you to get monitored. The sooner the better this week, since it is a holiday week.

Hope you feel better soon!

bridget could it be ligament streatching maybe? i know those kinda feel like cramps sometimes?

well, the cramps aren't really in my abdomen/uterus region. they're like period cramps that i get in my back. i feel stupid, but i can't tell if this could be poop related or not.

i don't really want to call my doctor (), i can't get there today and i have an appointment on wednesday anyway. i'm not even uncomfortable, there's just enough discomfort to notice but that's it.

Well it could be....
Are you constipated?

Also, I had bad back aches through pregnancy and it was because Kyleigh was pushing on my sciatic nerve.

Have you thought about seeing a chiropractor? I went when I was pregnant and it was the best thing ever. They do special things with pregnant women.
Plus, the 30 min massage afterwards was HEAVEN!

A massage sounds nice.

yeah i feel that in my lower back too sometimes when i have to poop

marianne, i hate chiropractors. i love massages though! it's definitely not sciatica, i have that constantly. it's not really a back problem either... i can't describe it.

it's pretty much gone now. i'm going to chalk it up to constipation (though i don't really feel constipated).

thanks though!

having cramps at 20 weeks. Is that normal with a little spotting but, it stop. What
could that have been. Does some strectching cause you to spot and cramp. I will go to the doctor on Wednesday any way.

im 20 weeks pregnant.been having period type pains and achy legs and feel very tired.its been for about 4 days now,should i be worried?its just like when im having bad period pains when im not pregnant