Buntis po ba pag lumalake yung puson? ?

First time having sex with my bf last week ng august and unprotected po sya. And now napapansin ko po na lumalake yung puson ko at matakaw po ako tapos antukin din. Buntis po ba pag ganun? Sana may makasagaot po. Badly need some opinions. #possibilityofpregnancy