Help are these evap all of them or start of a positive

Margaret

Hi, I took a test last night. Posted it but I’ve taken 4 today 😂, last being the top one , can all of these be evap all came up within the time limit and seem to get darker on drying, my period was due today and I’ve had some spotting not like the usual first day of my period at all and quite bad cramping on and off for a few days which again isn’t my normal