busy an forgot an dont know if i'm late stressed an worried

so i can't remember if i had my period in April because i am have been so busy an  now i'm worried that i'm pregnant. but i could have had it the week after easter or the week before so i'm not late yet if it was before an really not late if it was after but i'm so worried that i am knocked im can't sleep stressing out. if i take a pregnancy test will it be accurate even if i'm not late? or i could be a whole month late i honestly cant remember. advise?