Confused 🤷🏻‍♀️

🤔(So i am on birth control pills and my last period was late as well which i had on July 6th and after that period was over me and my boyfriend had sex that month from the 11th-27th and also the beginning of this month which is the 1st we had sex as well but now this month i was supposed to have my period by the 4th but i didn’t so i am 8 days late and like i said my period was supposed to start on the 4th but it didn’t so me and my boyfriend decided to have sex this month on the 10th and he came in me and now this morning i went to the bathroom and when i wiped i had light pink bleeding so i decided to put a pad on just Incase it what ever it may be. So i have small cramping, bloated always hungry , super sleepy then usual and my feet hurt when i walk i get tired fast walkin up stairs and hills more then before and also super lazy that my boyfriend had to help me go up hills and stairs a lot more then often and this never happen before)