First of all you have wrong information.ovulation is not 14 days from your last menstrual period, rather it is !4 days from your next menstrual period meaning thereby that after ovulation within 14 days you will get your menses.
This doesn't look like implantation bleeding and sometimes due to any stress or strain your menses can be delayed by few days which is perfectly normal, but in case you have any doubt you can do a
pregnancy test after the bleeding subsides