Vegans can eat their own boogers. Their whole disposition is on the basis of ethical consumption and consent. A cow can't consent to being milked. We've bred them and in a vegans eye's, exploited them for so long that, that's just the status quo. Similarly bees collect honey to feed themselves. They don't understand we take what we deem is a surplus to them. So they never consented to share with us.
If you pick your own boogers, you consented to do so. That means it's ethical to eat.
Absolutely. It goes without saying that women's bc pills come with a myriad of side effects. They often have to try different options to find what works for them. I'd personally enter the market as soon as its available, but I'd prefer for several options to be approved so we can pivot if one particular pill doesn't agree with you. Until then, a good old fashioned condom is my best friend.