When should I test?

simply

So I went to visit my SO and had sex on cycle day 22 and 23.

I normally get a positive Opk on cycle day 17 but I wasn’t testing cause I figured it would be too late when I saw him.

I have regular 28 day cycles so I was expecting my period to be here. And now it’s day 34 and no sign of AF. This has never happened to me before! My pregnancy test this morning was negative

It’s possible I ovulated late? When should I test again