Hello, I Scraped My Knees 2 Days Ago When I

Hello, i scraped my knees 2 days ago when I fell of a mobile motorbike. I've been cleaning the wound and applying neosporin and gauze on top for the past 2 days. I am now seeing a goo-ey yellow layer appear on top of the wound. Is this normal?

My knees are also very tender and I find it really hard to bend my knee or stand up for any stretch of time due to the weight being put on my knees.

Please advise if this is a part of the normal healing process and I just need to continue what I am doing now and wait it out. Thanks.