What kind of discharge do we get before missing periods for pregnancy..?

Is it necessary to have a discharge as an early sign of pregnancy..?

Or it is okay not to have any discharge..?!

I m 12 dpo and i am having white, slippery, lotion like discharge/CM..i ovulated on 14th day and my periods is due on 28th day.. today is my 25th day..

Can anyone predict if its my period or it s an early sogn of pregnancy..

Havent done a preg tested yet.. i m worried to face a BPN..

In a 28day cycle on whc day should i take a preg test of i miss my period..?

Kindly answer all of my questions ladies..would be helpful for me to stabilize my mind.. i m soo confused..