Vaginal bleeding after bowel movement

Hi, over the last couple of weeks I've noticed after I've had a bowel movement, I also have some vaginal bleeding. This isn't happening everytime but most. I have also been getting some cramping on and off but not due my period. I am a woman aged 43, I've had 2 children both normal deliveries. 12 years ago I had white cells removed from my cervix, then followed up with yearly smear tests for 10 years which were all normal. I also have the marina coil.