Scar Removal; what do I do? (Photos)

Almost a year ago I woke up with a large cut on the front of my leg. I have no clue how this happened. The weird part is our sheets & bedding are all white, yet nothing was stained with blood. Over the last several months I have tried a few different creams and exfoliants to try and remove it, nothing is really removing it. This has really affected my self confidence, now I don't wear anything that shows my legs :(