Crashing, but I'm due in early October with my 2nd child and had scary spotting (and bleeding) from weeks 7 through 25 this time around... I had a number of ultrasounds starting with the first occurrence at 7 weeks, and at 20 weeks (while I was on a business trip in Cairo of all places), I ended up in a hospital because of sudden severe passage of tissue/blood and lower back pain and pressure, and still... my cervix was long and closed, and everything was fine. And the tissue/blood was very scary -- having seen my mucous plug in the final days of my first pregnancy, I knew what it looked like and was convinced that what I was seeing in Egypt that day was undoubtedly a mucous plug. But no, thank God. Since then, the bleeding really tapered off and there was just a little bit around 25 weeks, nothing since then (and I'm 33 weeks now). The ultrasounds always showed a high placenta and no obvious reason for bleeding, like a hematoma.
No one ever had any answers about possible causes for bleeding, but even though I don't like to self-diagnose, I came upon the term "cervical erosion" online and really think that may be what I was experiencing.... at least that's what I told myself, because it would mean that there was no impact on the baby, but rather just about my body. Which it seems to be, since the baby is lively and well in there still!
I did find it all so stressful though, and still check for spotting every bathroom trip, all these weeks later, because it was present for so long. But everything is fine, and I'm sure I'll never know what caused it. Hopefully your bleeding will be just as benign, but I'm so sorry you have to go through it. Best of luck!
Julie, mom to Ansel (Sept '07) and Amalia (Sept '10)