Bleeding during sex

Hi ladies 
​So this past week my schedule showed red as for ovulating/fertile week... 
​I was home with my boyfriend cause I had a break at school and we had a lot of sex. 
​I was spotting during the day and when we had sex it was a lot of blood, he says he is okay with it and fine but it's very embarrassing to me.. 
​Has this happened to anyone? Is anything wrong or is it just cause I was ovulating that week? 
​Should I see a doctor? Thanks!!