Hi My Name Is Shakena And I Get My Period

Hi my name is shakena and i get my period every month on the 28 and i had sex with my boyfriend on the 16 and on the 23 on this month and spotted for 2 days then i was bleeding like i was haveing a period on and off then it last 12 days then today i spotted pink and brown and not i got cramps lil ones can i be pregnant.