What is happening?!?

I’m a week late for starting my period, 3 negative FRERS days apart starting on my supposed period start date. I threw up once the morning of the 10th while having a headache which never happens to me and I’ve been feeling great with no other symptoms to today the 19th. I’ve had some slight cramping the last 2 days like AF was coming but nothing, however my CM if EW, clear and copious amounts of it on my toilet paper yesterday so I assumed I ovulated extremely late as my periods have become irregular since the end of September. We BD’ed just in case but where is my period?!?