Irregular cycles

Hi guys ! I ovulated later than normal so now my period hasn’t come yet on the day it normally would . Is it ok to have an irregular cycle now and then? Today is cycle day 30 and I appear to have ovulated between cycle day 16-18 (two high peaks on 16 and 17 and then gone on the 18) . I’m really nervous as my period was due yesterday but I know it will be a little later because of the late ovulation. I just don’t know how late .... 😕