I used a butt plug and now when i wipe theres streak of bright red blood and my underwear is a bit stained and when i used the bathroom the water also turned bright red. is this too much bleeding? should i see a doctor or will it heal on its own?

Your rectal mucosa was damaged with the toy which causes bleeding. Because of the daily bowel movement so the site can't be healed quickly. A small amount of blood in your stool easily turns the bowl water red. The problem is usually self-limited but if bleeding persists or gets worse then you should see a gastroenterologist. Stay away from this toy and you should not contemplate anal intercourse.