Advice Needed Please 💕

So my cycle is usually 28-35 days long.

Never has it been longer than 35 days since I came off the pull last August.

We have been trying since then.

This month it is now day 40 and no sign whatsoever of my period.

I had cramps the day before day 35 and so I thought I was coming on. But nothing.

Im not stressed.

I don’t take medications other than paracetamol now and then.

My weight has stayed the same pretty much for the last year and is a normal healthy weight.

I have other children and the only time I missed a period was when I was pregnant.

I have done tests every other day including today and all negative.

Has this happened to anyone and they still ended up being pregnant?

Thanks in advance