Embarassing question but need some advice please!?

I'm 36 and for the past 3 months, I've been noticing blood when I wipe after urinating. It has happened 3 times in the past 3 months. I see it when I use the restroom and I will wipe and I will see a pinkish color on the tissue. The first 2 times, it happened just one time when I used the restroom and that was it. The last time which was Friday, I was taking a bath and on my wash cloth, I saw a brownish red color when I was washing my vaginal area and throughout the day, when I wipe, I saw a brownish color on the tissue. I am due for my menstral this week. Now, I have gone to the gynecologist and she said the bleeding wasn't coming from the vaginal area. My cervix looked fine and I had no infection. She recommend to go to a urologist as well as check my kidneys. I checked my kidneys with a ultrasound and everything was fine. My primary doctor thinks it may be the birth control pills that's making me have break through bleeding. Now, when I use the restroom to have a bowel movement, I see blood on the tissue. It's not a lot but it looks like little specks of blood. I did have a colonoscopy about 2 or 3 years ago and I had a poylp. Also, I was bleeding from the vaginal area in 2006 and they diagnosed it as inflammed cervix. What do you think can be causing these problems? Have anyone else have any similarities? I would appreciate any information or suggestions.