I am ttc and my period was 5 days ago. today i am bleeding again when i wipe, dark blood. could it be sex position or what? will i not ovulate?

Dark blood in cycle: It is not uncommon for dark brown or even black blood to be present at the end of the menstrual cycle. This is just older blood. It may even occur a few days after you thought your cycle was finished. Uterine contraction during orgasm could have promoted the release of the older darker blood. This will not likely affect ovulation.