Spotting

Hi everyone - this is my first pregnancy and I seem to always have some spotting after a bowel movement (it’s not hemorrhoids, it’s clearly coming from my lady bits) it’s usually just a light pink. I’m worried tho...went in for 1st ultra sound and baby was measuring 7w instead of 8w and with the spotting, the med assistant told us it’s a concern...dr came in after looking over ultra sound and said looks fine but I can get that it’s a concern out of my head. I still am having occasional spotting after bowel movement. I go back in a week and a half. Any other mamas have anything similar?!