need help plz

as glow my period was due on 21aug and its usually comes 25-26 day.i checked on 20 Aug n it's came negative. now it's two days late.since this morning I hav cramping like af coming but its not.this time camping lil different n weird too. I don't know what should I do.im 34 n trying for 2 baby. almost 5 years.