Clear Mucus Right Before Period What Is This Clear Mucus In My Period?

What is this clear mucus in my period? - clear mucus right before period

Recently I again take to the pill but had unprotected sex a week before returning to their stupid (I know) and I am now in a week and a time (usually very hard and finally, 5 to 7 Dryas). The first 4 days I had a little bleeding and a large quantity of fibrous matter much when I cleaned. I can not describe the appearance of the skin, placenta (I'm not an expert, as never before children) and no time? Miscarrige Could this be pregnant, or move when under stress? Please any advice would be great x