It’s 4 days since I was in the Ulez zone

On wed 16 July I was in an ulez zone for a couple of hours late pm. Just about .75 mile inside the zone. I’ve just realised I didn’t pay the ulez charge and I have a diesel car RO11sxt. I don’t imagine there is anything I can do?  As I’m too late and rules are rules?  But asking advice here please. It should have been paid for by midnight Saturday. Now it is 23.07 on Sunday.  I’m stressed at the moment and only just remembered. Bummer. Any advice would be much appreciated.
My husband is disabled, has a blue badge, and was in the car.  We were going to a health appointment for him with an alternative health practitioner ( homeopath).

It sounds like you are too late to pay. But if you only entered the zone by a small margin you may not have passed a camera.

Which part of London was this?

We were going to north cray road DA53NB . I’m can give the house number if that helps.

PS thanks for replying

Have you checked this, especially Item 1 on the Grace Period listing ?
https://tfl.gov.uk/modes/driving/ultra-low-emission-zone/ulez-expansion-support-for-disabled-people#:~:text=ULEZ%20grace%20period%20(temporary%20discount),-If%20you%20are&text=Eligible%20applicants%20for%20these%20grace,the%20following%203%20grace%20periods.

The car is NOT registered with the DVLA as having 'disabled' or 'disabled' passenger vehicle tax class benefit.  SADLY.

That post code is literally on the ulez border so you may be in luck.

Did you come in from the east on Old Bexley Lane (A2018) , then south onto North Cray Road at the roundabout?

Edit - the cameras aren't until further south than the postcode you supplied.  But it's a duel carriageway so not sure if you can exit to head back north before you pass them...

Thanks.  I’ll have to wait and see.  There’s clearly nothing I can do.  Thanks for responding everyone.