Missed period but tests are negative

My post was deleted for some reason but my period was supposed to be here on the 19th. My period is normal and always on time and I’ve had no lifestyle changes or problems. I’m not able to get a blood test at the moment but my HPT are all negative, even the first response ones. This has never happened to me before and I’ve never been this late without a positive test which I would’ve gotten by now. Some ladies have said I might have ovulated late. Could I still be pregnant if that’s the case? Has anyone else been through this and ended up being pregnant? If not pregnant then what was the problem? And no this wasn’t planned so there was no stressing about trying to make a baby. TIA