I am a bit worried about these lines i noticed inside my vagina. they are white and almost look like a flap, they are located on both sides of the back of my lips, heading toward anus. no real itching, normal discharge...are these normal?

It seems abnormal if you have not seen these lines before but now they suddenly appear. Because you are asymptomatic so I suggest you can observe for a couple days and use warm sitz bath with baking soda 3 times (15 minutes each time) in the mean time + sexual abstinence if you are sexual active. If new symptoms develop or these lines persist & get worse then you should see a GYN doctor.