CM SMELLS LIKE IRON/PERIOD BLOOD

So today I've have extreme watery yet milk cm and when i sneeze I can feel it in my panties. So im here about to was clothes and I start to smell period blood. So since I'm already wet I now thought it was period blood what came out when i sneezed. Both bathrooms are occupied so I'm in the laundry room sorting out clothes when I start to smell period blood. So I'm like ugh not again right, so I checked by putting 1 finger in and nope not blood just watery yet milk cm that smells like iron/period blood. My question is could I be pregnant or just probably af about to visit? Or its just normal? Af isn't due til the 21st of this month.