Is this an infection?? EXTREME TMI - Please don't report, just help.

Ladies help! What is this?? I just went to the bathroom to find that on my panties.. I know discharge is normal but I never had it this much before and in that color. My vagina doesn't itch and it doesn't smell like anything. Last time I had sex was a week ago and that is also when my period finished. Any clue what this may be? Should I see a doctor??