(TMI) Why am I having this weird discharge?

I've had this weird discharge for 5 days in a row now. It's very thick and gooey and has no scent at all.. It's either on my panties but usually comes when I wipe. Any idea what could be causing this? Sorry for the nasty pictures but I've never had this before so I'm worried. 
I've also been having bad abdominal pain if that matters. And stopped taking birth control 2 weeks ago.