Hellppp late question

Ok so question could i still possibly be pregnant? I ovulated in Cd14 and on cd20 i had tons of mucus with a slight small amount of brown/pink discharge and cramping. My period was due 2 days ago (today is cycle day 31) and no signs of AF showing up.

I’ve taken one digital test last week at night that was negative and another today mid afternoon. I also took a frer test but it was invalid.

Could i possibly be pregnant and need to retest later or maybe try to test in morning. I work nights so sometimes it’s hard to get fresh urine in the morning because I’m peeing throughout my shift.