I have first positive opk may 29-31 .. regular period due on Friday June 8th.... I've done hcg test and agter test and nothing. I did a opk test last night and got a very positive

I usually start spotting but I have nothing at all. I have serious period like cramps which ended on Thursday so I thought forsure period was going to start. I am very very regular. I took hcg this morning and ofcourse it's negative

I don't know what's going on. I had horrible nausea today, which seem to go away by noonish. I seem to be exhausted, having to pee a bit more often. What in the world is going on ?? I keep wiping and thinking it's going to come but nothing.