My boyfriend evacuated inside me two days ago. i'm starting to get mild cramps sometimes. could i be pregnant ?

Always proofread: Proofreading is important. "Evacuated" means to poop (to have a bowel movement). Since girlfriends don't appreciate their boyfriends evacuating anywhere within 4 yards of them, we'll presume this is about "ejaculation". Yes, any fertile couple can get pregnant. A urine pregnancy test is accurate 3 weeks after sex, if one's normal regular period doesn't come (having a normal period = not pregnant).