I am just starting my 4th month of pregnancy, and I have had a small amount of brown spotting. I visited the hospital and was examined, and the doctor says I have an "involuted" cervix, which apparently means there is some tissue like the inside of the cervix on the OUTSIDE of the cervix. I was told that this tissue can be easily injured and will then bleed. The cervix was closed, however, indicating the bleeding was definitely from the inside, and not the outside. I also had an ultrasound, and the baby was fine. This was my experience, but I suggest you do visit your care provider or a hospital if you are having any spotting or pain. Everybody's different. Hope this helps!