Need advice

Has anyone missed AF and been getting negative pregnancy test and blood test and still no AF? How far along where u once you did get your BFP? Im 19 days late my last AF was march 29 and i did get positive opk and another opk positive on end of April which i had 2 ovulation in April, i still haven't gotten AF or BFP i never went through this, thats why i was wondering if anyone ever got there BFP and how far along where y'all when yall found out? Im kinda scared nervous that i could be going through something else😞