Confused

Well I thought I had answers... but I don't. I got in the mail today, a paper from my Dr going over my test results. I must have heard the nurse wrong, since the lab results say that I have indicators for POC, but I did indeed ovulate this month.

UGH!!!!!!!!!!!

I guess the test he wants me to have is called hysterosalpingogram after I have my period. What is this exactly? This is from web md:

A hysterosalpingogram (HSG) is an X-ray test that looks at the inside of the uterus and fallopian tubes and the area around them. It often is done for women who are having a hard time becoming pregnant (infertile).
During a hysterosalpingogram, a dye (contrast material) is put through a thin tube that is put through the vagina and into the uterus. Because the uterus and the fallopian tubes are hooked together, the dye will flow into the fallopian tubes. Pictures are taken using a steady beam of X-ray (fluoroscopy) as the dye passes through the uterus and fallopian tubes. The pictures can show problems such as an injury or abnormal structure of the uterus or fallopian tubes, or a blockage that would prevent an egg moving through a fallopian tube to the uterus. A blockage also could prevent sperm from moving into a fallopian tube and joining (fertilizing) an egg. A hysterosalpingogram also may find problems on the inside of the uterus that prevent a fertilized egg from attaching (implanting) to the uterine wall.

Why It Is Done

A hysterosalpingogram is done to:

• Find a blocked fallopian tube. The test often is done for a woman who is having a hard time becoming pregnant. An infection may cause severe scarring of the fallopian tubes and block the tubes, preventing pregnancy. Occasionally the dye used during a hysterosalpingogram will push through and open a blocked tube.
• Find problems in the uterus, such as an abnormal shape or structure, an injury, polyps, fibroids, adhesions, or a foreign object in the uterus. These types of problems may cause painful menstrual periods or repeated miscarriages.

Why does it seem to me that this is always the case? Nothing is easy, there is always something in my life, complications that no one else seems to have.
So onto complication number two.... granted maybe my little tracker thing is off, but I was expecting my period on Sunday, and I still haven't had it. I'm late by 3 days. Should I get a pregnancy test? Do I chalk it up to something my body is doing, being weird?