Causes of pelvic pain?

I am a 39 year old woman, had tubes tied about 10 years ago and in the last week I have had pain in my lower pelvic area. Not on either side but more all the way across, from one side to another. It has just been off and on til today it seems to be a little more. It's not horrible pain but it is noticeable and there are times that there are sharp pains with the constant pain...anyone have any idea what it might be...just started all of sudden and it's not time for my period. I have a doctors appt on Tuesday but just thought I would see if anyone had any ideas what it might be..oh and also want to add, not sure if it is related but I have also had changes in my bowel moments, been having a lot of gas and also having and/or feeling like have to urinate alot more then normal.

Tamitha

Acute pelvic pain is pain that starts over a short period of time anywhere from a few minutes to a few days. This type of pain is often a warning sign that something is wrong and should be evaluated promptly.
Pelvic pain can be caused by an infection or inflammation. An infection doesn't have to affect the reproductive organs to cause pelvic pain. Pain caused by the bladder, bowel, or appendix can produce pain in the pelvic region; diverticulitis, irritable bowel syndrome, kidney or bladder stones, as well as muscle spasms or strains are some examples of non-reproductive causes of pelvic or lower abdominal pain. Other causes of pelvic pain can include pelvic inflammatory disease (PID), vaginal infections, vaginitis, and sexually transmitted diseases (STDs). All of these require a visit to your healthcare provider who will take a medical history, and do a physical exam which may include diagnostic testing.

Women who have ovarian cysts may experience sharp pain if a cyst leaks fluid or bleeds a little, or more severe, sharp, and continuous pain when a large cyst twists. Fortunately, most small cysts will dissolve without medical intervention after 2 or 3 menstrual cycles; however large cysts and those that don't rectify themselves after a few months may require surgery to remove the cysts.

An ectopic pregnancy is one that starts outside the uterus, usually in one of the fallopian tubes. Pain caused by an ectopic pregnancy usually starts on one side of the abdomen soon after a missed period, and may include spotting or vaginal bleeding. Ectopic pregnancies can be life-threatening if medical intervention is not sought immediately. The fallopian tubes can burst and cause bleeding in the abdomen, if left untreated. In some cases surgery is required to remove the affected fallopian tube. Source(s): http://womenshealth.about.com/cs/pelvicp...

Perhaps you have ovarian cysts. They are extremely painful when they decide to rupture. Insist on your Dr. to send you for a ultrasound. No matter there is a reason for the pain and you want to find out why.
It could be a UTI with cystitis. Endometriosis. Pelvic inflammatory disease. Uterine cancer. Bladder cancer (if you smoke). Polycystic ovaries. Many other things.
You have a lot of somatic symptoms, which might be due to stress, but this should be a diagnosis of exclusion. Do you suffer from lower back pain? It could be radiating to the belly and give the impression of pelvic pain. Gas pain can act like that as well. It is good you have the appointment soon enough, as it is difficult to actually make a diagnosis based on your information alone.
Keep us posted!
an MD
Good thing you are going to the Doctor. It could be endometreosis, ovarian cysts, or ectopic pregnancy which is very dangerous for you