Hello, I do the same, I never have the problem of accidentally hitting buttons. Lying on your side works, but it's most comfortable when you're lying on your back.

I have already done this. It works reasonably well with a soft pillow. But in the long run (hour or more) it gets a bit uncomfortable.

Of all the in-ear headphones I've had, these are the best for the price. Otherwise they always fall out, hurt or are hard to hear etc... Whether I'm at work, doing sport or travelling on public transport, everything is great. But only when sleeping on my back, because the headphones are on top.