Discharge and blood, after 2 missed periods??

after me and my boyfriend had , he told me that there was blood, and when i wiped it off there was boy and a lot of discharge. now last month i was suppose to get my period and i didn't , i forgot to take 2 pills throughout the month and then the week i was suppose to have my period, that sunday i had light spotty bleeding for one day and then it was gone. I didn't have my period at all last month, well at one point i thought that i might have been pregnant because i was cramping and i seemed to have symptoms of pregnancy, well my test came out negative, well i was suppose to get my period last week and it didn't come,i stopped taking my BCP's after that week. what can it mean that i have this little bit of pink blood and a good amount of discharge, it has to smell to it and after we had it seems that i hurt, like it is all swollen and stuff, im a little scared because im not sure what is going on. If anyone has any answers or suggestions or whatever it would be greatly helpful.