I'm four days late i should of gotten it on the 18th but now it's the 22nd could it be delayed or am i pregnant?

Check pregnancy test: If you had unprotected genito-vaginal sexual intwrcourse with a fertile man, there is a risk that your may be pregnant. An accurate urine pregnancy test or a blood betaHCG pregnancy test should answer your question. Check soon and if test is negative, (you are not pregnant) and need to reduce your risks of pregnancy, consult a Gyn about an intrauterine device(IUD) or a subdermal a implant ASAP.