For those who got pregnant on the paragard, what were your first clues that it failed. Obviously a missed period being a main one but anything else that stood out to you.

Backstory: I have had my paragard for almost 6 years now and since day 1 my cycle has been 24 to 26 days and always 10 to 12 days long. Right now I'm 4 days late and TMI a slimy brown discharge. Any advice would be greatly appreciated. Edit to add I will be testing tomorrow just looking for any experience.