Put your legs up in the air

How long did you keep your legs up against the wall to get your BFP? I have never put my legs in the air like up on the wall when ttc because i usually use 2 pillows/couch cushions type of firm pillows to keep my hips propped up but is there a difference? Scooching around after sex is also hard because the good leak out. Should I keep doing the pillow method or use both pillow AND wall and for how long? !