Cramping but no period?

[Meredithgrey1]

My period is now two weeks late (I typically have a 28-30 day cycle, today is day 42).
But for the last two weeks I’ve had symptoms like it’s just about to start. I had my typical pms symptoms around day 26-30 (low mood, cranky, sore breasts, nausea) and then from about day 30 I’ve had mild cramping that has had me convinced every time I go to the loo that it will have started. Several times a day I think “yep, that’s definitely period cramping, it will start soon”.
I’ve taken three pregnancy tests, all first thing in the morning, all negative - most recent one was this morning.
Where is it? Is this concerning? If it’s not concerning, at what point should I start to be concerned? I sort of feel like if I wasn’t having the symptoms I’d be less worried, but why have I had mild cramps for two weeks with no actual period?

If relevant, I am still breastfeeding DD (18 months) but only first thing in the morning. My periods restarted about 6 months ago.

I came off the contraceptive pill 5 weeks ago and had my withdrawal bleed a couple of days later. 2 weeks later I had some very light spotting and brown discharge. My period was technically due last week but it hasn't shown yet. All I'm getting is period like cramps. Done 2 tests which have come back negative