Bleeding after sex

Stephanie • I`m 21 been with my partner for 5 years. We are TTC wish us luck
So I alway 100% bleed an hour or so after sex
It's only Light but it's painful but so is sex 
Once I bleed the next day I get this brown stringy shit I get bad cramps like period pain but I don't have my periods (trying to regulate after coming off the contraceptive needle) but it only lasts a few hours tops 
So now every time after sex I have to wear a pad and even the next day which is very unattractive after sex instead of being able to enjoy yourself afterwards relaxing and cuddling